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BEGIN:VEVENT
SUMMARY:Alain Goriely (Oxford University)
DTSTART:20200602T160000Z
DTEND:20200602T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/1
DESCRIPTION:Title: The surprising shape of planets\nby Alain Goriely (Oxf
ord University) as part of Maths seminars at the University of Galway\n\n
\nAbstract\nWe usually picture planets as spheres. Yet\, the first problem
of gravitational physics was to determine the shape of an object due to i
ts own mass. In the case of a fluid planet\, this problem was considered
so important that most of the great physicists and mathematicians worked o
n it for the last 350 years before a satisfactory theory was established.
In the case of a solid planet\, the problem is quite different and much mo
re complicated. The problem is to determine the possible equilibria of a
planet modelled as a homogeneous compressible spherical elastic body subje
ct to its own gravitational field. In the absence of gravity the initial r
adius is given and the density is constant. With gravity and for small pl
anets\, the elastic deformations are small enough so that the spherical eq
uilibria can be readily obtained by using the theory of linear elasticity.
For larger or denser planets\, large deformations are possible and surpr
ising behaviours emerge as will be revealed during this talk.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sarah Muldoon (University at Buffalo)
DTSTART:20200604T130000Z
DTEND:20200604T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/2
DESCRIPTION:Title: Personalized brain network models\nby Sarah Muldoon (U
niversity at Buffalo) as part of Maths seminars at the University of Galw
ay\n\n\nAbstract\nPersonalized Brain Network Models (BNMs) are a new type
of computational tool that simulate a specific individual’s brain activi
ty based on measured structural brain connections. These models have been
shown to be sensitive to individual differences in brain network structure
and allow one to perform in silico experiments in order to make predictio
ns about the effects of stimulation\, disease progression\, or drug treatm
ent at the level of a specific individual. I will describe how one build s
uch computational models from neuroimaging data and describe work using pe
rsonalized BNMs to explore individual differences in brain structure and f
unction.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Krishnan Shankar (The University of Oklahoma)
DTSTART:20200611T150000Z
DTEND:20200611T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/3
DESCRIPTION:Title: A mathematical exploration\nby Krishnan Shankar (The U
niversity of Oklahoma) as part of Maths seminars at the University of Gal
way\n\n\nAbstract\nIn this talk we will explore a variety of mathematical
ideas in dynamical systems\, arithmetic and geometry. I will present thre
e beautiful yet elementary constructions which point to a deeper hidden st
ructure in each case. We will explore\, for instance\, how billiard balls
naturally spell out the digits of pi or how the arithmetic mean\, geometr
ic mean inequality of numbers leads to a deep\, unsolved problem in geomet
ry. While the full explanation of the "why" of these phenomena require gr
aduate level or advanced mathematics\, most of the talk is meant to be acc
essible to anyone with a college level background in mathematics.\n\nZOOM:
https://zoom.us/j/98366657903?pwd=Y2FuMkZWbmJQd1NCeHAyQkRNak01Zz09\n\nMEE
TING ID: 983 6665 7903 Password: 830340\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrew Lobb (Durham University)
DTSTART:20200618T100000Z
DTEND:20200618T110000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/4
DESCRIPTION:Title: The smooth rectangular peg problem\nby Andrew Lobb (Du
rham University) as part of Maths seminars at the University of Galway\n\
n\nAbstract\nFor any smooth Jordan curve and rectangle in the plane\, we s
how that there exist four points on the Jordan curve forming the vertices
of a rectangle similar to the given one. No expertize assumed. Joint wor
k with Josh Greene.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hannah Conroy Broderick (NUI Galway)
DTSTART:20200901T130000Z
DTEND:20200901T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/5
DESCRIPTION:Title: Wrinkles and waves in soft dielectric plates\nby Hanna
h Conroy Broderick (NUI Galway) as part of Maths seminars at the Universi
ty of Galway\n\n\nAbstract\nSoft dielectric materials are smart materials
that deform in the presence of an electric field. They have potential prom
ising applications in devices such as artificial muscles and soft robotics
\, where there is great demand for materials that can undergo repeated lar
ge deformations. \n\nIn principle\, large deformations can be obtained by
exploiting the so-called snap-through instability. However\, this phenomen
on is difficult to achieve and control in practice\, as the material often
fails due to electric breakdown\, or due to wrinkles appearing on the sur
face of the material. Here we study in turn the stability of voltage and c
harge-controlled soft dielectric plates. We investigate Hessian and geomet
ric instability modes. We find that voltage-controlled dielectrics can wri
nkle in compression and extension\, whereas charge-controlled dielectrics
can only wrinkle in compression. We find that charge-controlled actuation
is more stable than voltage-controlled actuation.\n\nStudies on waves in d
ielectric materials suggest the possibility of controlling the wave veloci
ty by applying an appropriate electric field. This paves the way for apply
ing acoustic non-destructive evaluation techniques to dielectric plates\,
a technique already used in purely elastic materials. Here we study Lamb w
ave propagation in dielectric plates subject to electrical and mechanical
loadings. We look at the effects of the pre-stress\, the electric field an
d the strain-stiffening on the wave characteristics.\n\nThis work relies o
n theoretical and numerical treatments\, using the multiphysics theory of
nonlinear electro-elasticity\, the incremental theory of small deformation
s and motions superposed on a large actuation\, the Stroh formalism\, the
numerical resolution of boundary-value problems\, and Finite Element simul
ations.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Haixuan Yang (National University of Ireland Galway)
DTSTART:20201008T150000Z
DTEND:20201008T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/6
DESCRIPTION:Title: A Heat Diffusion Model on a graph with boundary conditions
and its Applications\nby Haixuan Yang (National University of Ireland
Galway) as part of Maths seminars at the University of Galway\n\n\nAbstr
act\n15 years ago\, we developed a heat diffusion model on a graph\, and a
pplied it to classification problems and ranking problems. This model only
has initial conditions\, but no boundary conditions. 17 years ago\, there
was a famous method (Harmonic Method) using harmonic functions on a graph
\, which has no initial conditions\, but has boundary conditions\, and the
solution is an equilibrium of heat diffusion models\, i.e.\, the time goe
s infinity. Recently we considered a heat diffusion with both initial cond
itions and boundary conditions. The labelled nodes in a graph are set as b
oundary conditions that will exert their influence on other unlabelled nod
es while the initial guess on the unlabelled nodes are set as initial cond
itions. The diffusion process thus balances these two sets of conditions:
When times go to infinity\, it becomes equilibrium\, and thus the method b
ecomes the Harmonic Method\; When time is zero\, there is only initial gue
ss. We believe that there are some cases\, for which the status before the
equilibrium is achieved is better. This is a joint work with Mohan Timil
sina\, Vit Novacek\, Mathieu d'Aquin at INSIGHT.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Peter Clarkson (University of Kent)
DTSTART:20201112T160000Z
DTEND:20201112T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/7
DESCRIPTION:Title: Some reflections on Athena SWAN\nby Peter Clarkson (Un
iversity of Kent) as part of Maths seminars at the University of Galway\n
\n\nAbstract\nIn this talk I shall give some personal reflections of Athen
a SWAN applications based on my experience as the chair of my School's Ath
ena SWAN Self Assessment Team as an Athena SWAN panelist and as chair of t
he London Mathematical Society Good Practice Scheme steering committee. In
particular I'll describe some aspects of good practice as well some which
in my opinion should be avoided.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bharat Tripathi (National University of Ireland Galway)
DTSTART:20201126T160000Z
DTEND:20201126T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/8
DESCRIPTION:Title: On Modelling and Simulation of Nonlinear Waves for Biomedi
cal Problems\nby Bharat Tripathi (National University of Ireland Galwa
y) as part of Maths seminars at the University of Galway\n\n\nAbstract\nB
eing a new faculty at the School\, I would like to talk about my doctoral
and post-doctoral research work. It is on the development of mathematical
models and numerical methods describing the propagation of nonlinear-acous
tic and nonlinear-shear waves in fluids and solids\, respectively.\n\nMy d
octoral work (at Sorbonne Université\, Paris\, France) was about the deve
lopment of a discontinuous Galerkin method for simulating acoustic shock w
aves in air/water in 2D. This method was used to study the nonlinear refle
ction of acoustic shock waves on rigid surfaces\, ranging from the linear
Snell-Descartes reflection to the weak von Neumann case. A convex-concave
surface was designed to show the formation of secondary smooth Mach stem u
sing the primary smooth Mach stem\, which to our knowledge was never obser
ved before in acoustics. \n\nDuring my postdoctoral years (at University o
f North Carolina at Chapel Hill\, USA)\, I was working on modelling and si
mulation of shear shock waves in the brain in context of traumatic brain i
njury. This led to the development of a system of nine equations describin
g the nonlinear propagation of linearly-polarized shear waves in relaxing
soft solids with ability to incorporate an arbitrary frequency dependent
attenuation/dispersion power-law. The model was then numerically simulated
using the piecewise parabolic finite volume method. This model/method was
validated with experimental data and was used to show the formation of sh
ear shock waves\, for the first time\, in a human head phantom.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Tuite (National University of Ireland Galway)
DTSTART:20201203T160000Z
DTEND:20201203T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/9
DESCRIPTION:Title: Vertex operator algebras and a generalized MacMahon master
theorem\nby Michael Tuite (National University of Ireland Galway) as
part of Maths seminars at the University of Galway\n\n\nAbstract\nVertex
operator algebras have remarkable links with number theory\, combinatorics
\, geometry\, group theory and theoretical physics. In this talk I discuss
the application of a generalized MacMahon master theorem from enumerative
combinatorics to the description of the Heisenberg vertex operator algebr
a (the bosonic string in theoretical physics) on a Riemann surface.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Richard Burke (National University of Ireland Galway)
DTSTART:20201127T120000Z
DTEND:20201127T130000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/10
DESCRIPTION:Title: Emergence in hybrid adaptive multi-agent systems\nby
Richard Burke (National University of Ireland Galway) as part of Maths sem
inars at the University of Galway\n\n\nAbstract\nThis thesis investigates
a number of hybrid adaptive strategies\, to drive multi-agent systems fro
m initial states of disorder towards consensus or favourable configuration
s. The dynamics of the agents and their communicative links\, represented
by nonlinear ODEs\, may be visualised as evolving networks. Numerical expe
riments supplement the mathematical models presented.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dúalta Ó Fionnagáin (National University of Ireland Galway)
DTSTART:20201119T160000Z
DTEND:20201119T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/11
DESCRIPTION:Title: Modelling the winds of low-mass stars like our Sun\nb
y Dúalta Ó Fionnagáin (National University of Ireland Galway) as part o
f Maths seminars at the University of Galway\n\n\nAbstract\nStars similar
to the Sun evolve through their lifetime through two main mechanisms\; th
e loss of mass and angular momentum. This occurs through the interaction o
f the stellar wind and the stellar magnetic field. For low-mass stars like
our Sun\, detection of these winds is very difficult with current telesco
pes. Using 3D magnetohydrodynamic modelling tools (BATS-R-US)\, we can qua
ntify the winds from these stars\, constraining their possible evolutionar
y paths. Since stellar winds directly impact orbiting exoplanets\, it also
impacts their evolution and their potential habitability.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Viola Siconolfi (Bielefeld University)
DTSTART:20201210T160000Z
DTEND:20201210T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/12
DESCRIPTION:Title: Ricci curvature\, graphs and Coxeter groups\nby Viola
Siconolfi (Bielefeld University) as part of Maths seminars at the Univer
sity of Galway\n\n\nAbstract\nI will talk about a notion of curvature for
graphs introduced by Schmuckenschläger which is defined as an analogue of
Ricci curvature. This quantity can be computed explicitly for various gra
phs and\nallows to find bounds on the spectral gap of the graph and isope
rimetric-type inequalities.\nI will present some general results on the co
mputation of the discrete Ricci curvature of any locally finite graph. I w
ill then focus on graphs associated with Coxeter groups: Bruhat graphs\, w
eak order graphs and Hasse diagrams of the Bruhat order.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Martin Winter (TU Chemnitz)
DTSTART:20210304T160000Z
DTEND:20210304T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/13
DESCRIPTION:Title: On Symmetry\, Rigidity and Spectrum of Graph Realizations
and Polytopes\nby Martin Winter (TU Chemnitz) as part of Maths semina
rs at the University of Galway\n\n\nAbstract\nA graph realization is an e
mbedding of a graph into Euclidean space\, such as the skeleton of a polyt
ope. We consider graph realizations and polytopes with prescribed symmetri
es\, and we aske whether they can be continuously deformed without losing
these symmetries\, that is\, whether they are rigid or \nflexible under th
e given symmetry constraints. We identify classes of symmetries for graphs
and polytopes\, so that any realization of this symmetry is necessarily r
igid. We thereby demonstrate that spectral graph theory is a useful tool i
n studying the interplay between symmetry and rigidity.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thái Anh Nhan (Holy Names University\, CA)
DTSTART:20210318T160000Z
DTEND:20210318T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/14
DESCRIPTION:Title: Five years after my PhD: life\, work\, and research\n
by Thái Anh Nhan (Holy Names University\, CA) as part of Maths seminars a
t the University of Galway\n\n\nAbstract\nI graduated with my Ph.D. in 20
15 under the supervision of Dr. Niall Madden. In this talk\, I will report
a five-year pleasant adventure of my life including the changes in life\,
work\, and research. In particular\, for the research\, I will discuss ou
r recent result that answered a decades-old question in the field of singu
larly perturbed differential equations regarding the finite-difference ana
lysis on the Bakhvalov mesh for two-dimensional convection-diffusion probl
ems.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:James Cruickshank (NUI Galway)
DTSTART:20210218T160000Z
DTEND:20210218T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/15
DESCRIPTION:Title: Rigidity and combinatorial topology\nby James Cruicks
hank (NUI Galway) as part of Maths seminars at the University of Galway\n
\n\nAbstract\nI will present an introduction of some of the connections be
tween the rigidity theory of bar joint frameworks and combinatorial topolo
gy. The foundational result in this respect is Cauchy's Rigidity Theorem f
rom 1832\, but there have been many interesting developments in more recen
t times. No specialist knowledge of rigidity theory or of combinatorial to
pology will be assumed. I will finish by discussing some recent joint work
with Bill Jackson (Queen Mary) and Shin-Ichi Tanigawa (University of Toky
o) on the global rigidity of triangulated surfaces.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Roberto Galizia (NUIG)
DTSTART:20210415T080000Z
DTEND:20210415T090000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/16
DESCRIPTION:Title: PhD viva -- Exploiting individual agent properties for an
alysis and control of collective network evolution\nby Roberto Galizia
(NUIG) as part of Maths seminars at the University of Galway\n\n\nAbstra
ct\nWe investigate linearly coupled dynamic networks made up of identical
agents. We study the principles in which the dynamical features of the und
erlying constituent agents transfer to the collective dynamics of the enti
re network. This is carried out from two points of view: analysis and cont
rol. In the former case\, we defined and discussed the Regions of Reduced
Dynamics\, a particular subset of the network parameter space in which the
behaviour of the entire network can be fully determined from the dynamics
of the underlying constituent agents. In the latter case\, we designed a
decentralized control algorithm that drives networks towards a desired sta
te while only acting on a subset of network nodes without using any global
information about the network.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pawel Dlotko (Polish Academy of Sciences)
DTSTART:20211104T160000Z
DTEND:20211104T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/17
DESCRIPTION:Title: Mild introduction to Topological Data Analysis (ONLINE)\nby Pawel Dlotko (Polish Academy of Sciences) as part of Maths seminars
at the University of Galway\n\n\nAbstract\nOften applied mathematics is
considered to be restricted to differential equations and dynamical system
s theory. Recently\, however\, we see a growth of combinatorial\, geometri
cal and topological techniques used in applied sciences. In this talk I wi
ll introduce two main techniques of applied topology: persistent homology
and mapper algorithm. Starting from discrete collections of points P we wi
ll use them to build descriptors summarizing the shape of P. The talk will
be illustrated with examples of applications of presented tools in very d
ifferent branches of physical\, medical and social sciences. We will also
discuss the interface of the presented methods with statistics/ machine le
arning.\n\nContact: Graham Ellis\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Romina Gaburro (University of Limerick)
DTSTART:20210623T130000Z
DTEND:20210623T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/18
DESCRIPTION:Title: Inverse problems and imaging\nby Romina Gaburro (Univ
ersity of Limerick) as part of Maths seminars at the University of Galway
\n\n\nAbstract\nIn this talk we introduce the concept of inverse problem\,
the mathematical technique behind imaging and material characterisation.
We explain its intrinsic ill-posed nature\, the idea of inversion from dat
a/measurements to parameter (describing a physical property of a medium) a
nd the mathematical challenges behind imaging.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Noemi Picco (Swansea University)
DTSTART:20210624T103000Z
DTEND:20210624T113000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/19
DESCRIPTION:Title: Modelling Drug Resistance in Cancer Across Scales\nby
Noemi Picco (Swansea University) as part of Maths seminars at the Univer
sity of Galway\n\n\nAbstract\nResistance to drug treatment for many types
of cancer is poorly understood. In many cancer patients it appears in the
form of a temporary response to the drug (with the tumour shrinking)\, fol
lowed by relapse (regrowth). For a specific class of cancers (e.g. melanom
a and non small cell lung cancer) treated with so-called targeted therapie
s\, resistance seems to be the result of complex interactions between the
cancer cells\, the host tissue\, and the drug\, operating across different
spatial and temporal scales.\n\nTo fully understand cancer and its respon
se to treatment\, we are faced with the challenge of understanding how cel
ls behave in the absence of a drug\, and how the dynamics shift when treat
ment is applied.\n\nI will present two mathematical models that approach t
his challenge at different levels (scales)\, to show how data-driven model
ling can describe the processes of interest and make testable predictions.
For both models I will present some preliminary findings and highlight th
e current limitations in the interpretation of model predictions\, and the
importance of modelling in the design of treatment protocols able to succ
essfully control the emergence of resistance.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Giuseppe Zurlo (National University of Ireland Galway)
DTSTART:20210916T150000Z
DTEND:20210916T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/21
DESCRIPTION:Title: Growing\, melting\, twisting: three stories from mechanic
s (ONLINE)\nby Giuseppe Zurlo (National University of Ireland Galway)
as part of Maths seminars at the University of Galway\n\n\nAbstract\nIn t
his talk I will give an informal account on three problems that I have stu
died during my recent sabbatical leave. I will first talk of memory in gro
wing bodies\, like sandpiles or biological tissues\, shedding emphasis on
the differential geometric nature of "memory". I will then talk of what ha
ppens when you use a 3D printer\, why often cracks form and how dangerous
neglecting this effect can be. I will finally talk of what happens when yo
u twist a thin cord\, like the ones you may find in key holders: after you
twist them enough\, a kink is formed\, and here I provide a simple energe
tic explanation of this effect.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Harold Berjamin (NUI Galway)
DTSTART:20211021T150000Z
DTEND:20211021T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/22
DESCRIPTION:Title: Recent developments on the propagation of mechanical wave
s in soft solids\nby Harold Berjamin (NUI Galway) as part of Maths sem
inars at the University of Galway\n\n\nAbstract\nIn this talk\, I will gi
ve an overview of recent results obtained during my IRC postdoctoral fello
wship at NUI Galway\, covering several topics related to wave propagation
in soft solids. First\, the propagation of directional sound beams in elas
tic solids will be discussed. Second\, the propagation of nonlinear plane
waves in fluid-saturated porous media will be addressed. Then\, the modell
ing of viscoelastic dissipation will be considered\, including thermodynam
ic aspects\, acoustoelasticity theory\, and its application to the study o
f phononic crystals. Ongoing and future developments will also be presente
d.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quan Zhang (NUI Galway)
DTSTART:20211028T150000Z
DTEND:20211028T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/23
DESCRIPTION:Title: Low-Frequency Elastic Wave Manipulation and Vibration Iso
lation with Metamaterials\nby Quan Zhang (NUI Galway) as part of Maths
seminars at the University of Galway\n\n\nAbstract\nControlling wave pro
pagation through materials is of great importance to both engineering and
fundamental research. Metamaterials have significantly expanded the availa
ble material parameter spaces and brought advances to our control capabili
ty for wave propagation and vibration isolation. This talk focuses on low-
frequency elastic wave control and vibration isolation with metamaterials.
The content includes the following parts\, topological metamaterials with
local resonance and the corresponding interface propagating states\, tail
ored mechanical metamaterials with programmable quasi-zero-stiffness (QZS)
features for ultra-low frequency vibration isolation.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Faiza Alssaedi (NUI Galway)
DTSTART:20211015T083000Z
DTEND:20211015T093000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/24
DESCRIPTION:Title: Algorithms for the accurate and efficient solution of fou
rth order boundary-layer problems\nby Faiza Alssaedi (NUI Galway) as p
art of Maths seminars at the University of Galway\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Máire Ní Leathlobhair (Trinity College Dublin)
DTSTART:20220421T150000Z
DTEND:20220421T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/25
DESCRIPTION:Title: Timing landmark events in pre-cancerous evolution\nby
Máire Ní Leathlobhair (Trinity College Dublin) as part of Maths seminar
s at the University of Galway\n\nLecture held in ADBG021.\n\nAbstract\nTh
e interplay of mutation\, copy number change\, structural rearrangement an
d clonal expansion\, leaves a record of the life history of a cancer inscr
ibed in its genome. By applying recently developed bioinformatic and stati
stical methods to sequencing data\, we can reconstruct this life history\,
and infer the timing of specific events and mutational processes early in
tumour development. In this seminar we’ll look at some examples of this
in long-latency diseases such as myeloproliferative neoplasms and testicu
lar cancer.\n\nContact: Cathal Seoighe\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:confirmed
DTSTART:20220203T160000Z
DTEND:20220203T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/27
DESCRIPTION:Title: Presentation on two Master programmes\nby confirmed a
s part of Maths seminars at the University of Galway\n\n\nAbstract\nConta
ct: Aisling McCluskey\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dessislava Kochloukova (University of Campinas\, Brazil)
DTSTART:20220210T160000Z
DTEND:20220210T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/28
DESCRIPTION:Title: On the weak commutative construction in group theory\
nby Dessislava Kochloukova (University of Campinas\, Brazil) as part of Ma
ths seminars at the University of Galway\n\n\nAbstract\nWe will discuss s
ome old and some recent results on the weak commutativity construction X(G
) that associates to any group G a new group X(G). The definition goes ba
ck to a paper of Said Sidki (1980) and later it was discovered that this c
onstruction has strong links with the non-abelian tensor square of G. We w
ill give a survey on the properties of the construction X(G). One of the n
ew results that will be presented is a joint work with Martin Bridson that
whenever G is finitely presented the group X(G) is finitely presented too
.\nContact: Graham Ellis\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:FYP
DTSTART:20220217T160000Z
DTEND:20220217T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/29
DESCRIPTION:Title: FYP presentations\nby FYP as part of Maths seminars a
t the University of Galway\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Workshop
DTSTART:20220407T150000Z
DTEND:20220407T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/30
DESCRIPTION:Title: workshop on enumerative combinatorics\nby Workshop as
part of Maths seminars at the University of Galway\n\n\nAbstract\nNote:
the workshop is into the usual seminar time slot. \nContact: Angela\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jason DeVito (University of Tennessee)
DTSTART:20220602T150000Z
DTEND:20220602T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/32
DESCRIPTION:Title: The soul theorem and its converse\nby Jason DeVito (U
niversity of Tennessee) as part of Maths seminars at the University of Ga
lway\n\nLecture held in ADB1020.\n\nAbstract\nCheeger and Gromoll's Soul t
heorem gives a fundamental structure result for any complete non-compact R
iemannian manifold with non-negative sectional curvature: any such example
must have the structure of a vector bundle over a closed non-negatively c
urved Riemannian manifold. But\, given a closed non-negatively curved Rie
mannian manifold of non-negative sectional curvature\, which vector bundle
s over it admit non-negatively curved metrics? After surveying previous r
esults and constructions for homogeneous spaces and cohomogeneity one mani
folds\, we will discuss their applicability to Riemannian quotients of the
se spaces. We will then present a new construction which enlarges the cla
ss of known examples. This is joint work with David González-Álvaro.\nC
ontact: Martin Kerin\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/32/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Róisín Hill (NUIG)
DTSTART:20220516T083000Z
DTEND:20220516T093000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/33
DESCRIPTION:Title: PhD viva talk: Moving mesh methods for layer phenomena pr
oblems\nby Róisín Hill (NUIG) as part of Maths seminars at the Univ
ersity of Galway\n\nLecture held in AC201.\n\nAbstract\nLocation: AC201 an
d online\nContact: Niall Madden\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/33/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Maeve McCarthy
DTSTART:20220512T160000Z
DTEND:20220512T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/34
DESCRIPTION:Title: Control of Mosquito Populations Through the Introduction
of Sterile Mosquitoes\nby Maeve McCarthy as part of Maths seminars at
the University of Galway\n\n\nAbstract\nAs part of "Celebrating Women in
Mathematics in 2022" on May 12\, the NUI Galway SIAM Chapter will host a t
alk on Zoom by\nProf Maeve McCarthy\, Murray State University\, on "Contro
l of Mosquito Populations Through the Introduction of Sterile Mosquitoes".
The talk describes how differential equations can be used to model of mos
quito control\, and introduces some optimal control theory. It is aimed at
a general undergraduate audience.\n\nMaeve McCarthy is a graduate of NUI
Galway. She earned her PhD from Rice University\, and is now the Jesse D.
Jones Endowed Professor of Mathematics at Murray State\, Kentucky. She's h
as served as executive director of the Association for Women in Mathematic
s. For more about Maeve\, see https://en.wikipedia.org/wiki/Maeve_McCarthy
\n\nTo learn more about the significance of 12 May\, see https://may12.wom
eninmaths.org/why\n\nContact: NUI Galway SIAM Student Chapter\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/34/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stephen Russel (Valeo)
DTSTART:20220523T150000Z
DTEND:20220523T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/35
DESCRIPTION:Title: A vision based approach to driver assistance systems\
nby Stephen Russel (Valeo) as part of Maths seminars at the University of
Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn most modern vehicles t
oday\, advanced driver assistance systems are implemented in order to impr
ove road safety and driver comfort. As this technology becomes more sophis
ticated\, increased levels of vehicle autonomy are becoming a reality. Thi
s is achieved by processing and manipulating data that is collected from s
ensors placed around the vehicle. Vision-based systems use cameras as thei
r primary source of data. In this talk\, we will look at the role that com
puter vision plays in the development of driver assistance systems\, toget
her with some of the mathematics involved that make it all possible.\n\nCo
ntact: Valentina Balbi\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/35/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Antonia Trotta (Medtronic)
DTSTART:20220525T150000Z
DTEND:20220525T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/36
DESCRIPTION:Title: Finite Element Analysis - Application to Medical Device D
esign\nby Antonia Trotta (Medtronic) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nTranscathet
er Aortic Valve Replacement (TAVR) is a minimally invasive procedure for t
he replacement of a diseased aortic valve. During the procedure\, a delive
ry catheter system (DCS) is used to guide the TAV to the heart. The TAV is
then deployed over the native valve. Finite Element (FE) modelling is ext
ensively used during the development phase of the DCS to improve device de
sign and performance. The aim of this talk is to provide examples of appli
cations of finite element modelling to DCS design. In particular\, the tal
k will focus on a FE model developed to predict the performance of the DCS
during tracking\, where a number of parameters affecting the performance
of the DCS were investigated.\n\nContact: Valentina Balbi\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/36/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Beatrice Charamba (NUIG)
DTSTART:20220614T083000Z
DTEND:20220614T093000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/37
DESCRIPTION:Title: PhD viva talk: A Bayesian functional concurrent model for
missing irregular functional data\nby Beatrice Charamba (NUIG) as par
t of Maths seminars at the University of Galway\n\nLecture held in ADB102
0.\nAbstract: TBA\n\nContact: Andrew Simpkin\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/37/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sean McGinty
DTSTART:20221013T140000Z
DTEND:20221013T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/38
DESCRIPTION:Title: Understanding how anti-proliferative drug modulates arter
ial healing following endovascular device deployment: a mathematical and c
omputational approach\nby Sean McGinty as part of Maths seminars at th
e University of Galway\n\nLecture held in Alice Perry Engineering Buildin
g Rm 3052.\n\nAbstract\nNowadays\, it is taken for granted that stents are
a safe and effective treatment for obstructive coronary artery disease.
Clinical outcomes are good\, but even with contemporary devices\, repeat r
evascularisation rates at 1 year are still at least 3-5%\, increasing annu
ally at a similar rate\, with even higher rates in complex lesions such as
bifurcations. Through the years there have been a number of innovations i
ncluding thinner struts\, more biocompatible alloys\, biodegradable coatin
g and most recently bioresorbable scaffolds. Despite the astronomical in
vestment\, these have yielded only incremental improvements in patient out
come. The most disruptive technology in the field remains\, without doubt
\, the incorporation of anti-proliferative drug to create drug-eluting ste
nts (DES)\, with rates of restenosis (renarrowing) slashed from around 30%
to 5%\, compared with drug-free counterparts. In this talk\, we reconside
r the ‘drug’ aspect of DES and explore the potential of driving down s
tubborn repeat revascularisation rates further through optimisation of the
drug delivery protocol.\n\n \n\nFirstly\, we present a series of mathemat
ical models of varying complexity to model the effect of drugs on smooth m
uscle cell proliferation in an in-vitro environment\, and make comparisons
with experimental data. Our results highlight that\, at least for Sodium
Salicylate and Paclitaxel\, the current state-of-the-art nonlinear saturab
le binding model is incapable of capturing the proliferative response of S
MCs across a range of drug doses and exposure times [1].\n\n \n\nNext\, mo
ving towards the in vivo situation\, a novel continuum model of tissue gro
wth coupled with spatiotemporal delivery of drug is presented in order to
simulate the response of the artery to stenting. Our results indicate that
the severity and time-course of restenosis is critically dependent on the
drug delivery strategy. Specifically\, we uncover an intricate interplay
between initial drug loading\, drug release rate and restenosis\, indicat
ing that it is not sufficient to simply ramp-up the drug dose or prolong t
he time course of drug release to improve stent efficacy [2].\n\n \n\nFina
lly\, some preliminary work is presented that considers the incorporation
of disease (from intravascular imaging) within our models of stent drug re
lease and tissue transport\, motivating the need for a more tailored drug-
delivery strategy.\n\n \n\n[1] McQueen\, A.\, Escuer\, J.\, Aggarwal\, A.
\, Kennedy\, S. \, McCormick\, C.\, Oldroyd\, K. and Mcginty\, S. (2021) D
o we really understand how drug eluted from stents modulates arterial heal
ing? International Journal of Pharmaceutics\, 601\, 120575. (doi: 10.1016/
j.ijpharm.2021.120575)\n\n \n\n[2] McQueen\, A.\, Escuer\, J.\, Schmidt\,
A. F.\, Aggarwal\, A. \, Kennedy\, S. \, McCormick\, C.\, Oldroyd\, K. and
Mcginty\, S. (2022) An intricate interplay between stent drug dose and re
lease rate dictates arterial restenosis. Journal of Controlled Release\, 3
49\, pp. 992-1008. (doi: 10.1016/j.jconrel.2022.07.037)\n\nThis seminar is
jointly hosted by the School of Engineering and the School of Mathematica
l and Statistical Sciences.\nContact: Martin Meere & William Ronan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/38/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kelvin Killeen
DTSTART:20220913T110000Z
DTEND:20220913T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/39
DESCRIPTION:Title: PhD viva talk: Computing invariants of knotted manifolds<
/a>\nby Kelvin Killeen as part of Maths seminars at the University of Gal
way\n\nLecture held in SC200B.\nAbstract: TBA\n\n"Sandwiches will be serve
d in the School common room to all who are hungry at 12.45pm on Tuesday 13
September. This is prior to Kelvin Killeen's PhD viva which takes place a
t 2pm that day.\n\nAt 12pm in the video conference room - SC200B on the Co
ncourse - Kelvin will give a 30-minute presentation on his thesis work:\n\
nComputing invariants of knotted manifolds\nKelvin Killeen\n12pm 13 Sept 2
022\, SC200B"\n\nContact: Graham Ellis\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/39/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gotz Pfeiffer (University of Galway)
DTSTART:20220929T150000Z
DTEND:20220929T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/40
DESCRIPTION:Title: Falling Powers and the Algebra of Descents\nby Gotz P
feiffer (University of Galway) as part of Maths seminars at the Universit
y of Galway\n\nLecture held in ADB1020.\n\nAbstract\nA finite Coxeter grou
p of classical type A\, B or D contains a chain of\nsubgroups of the same
type. We show that intersections of conjugates\nof these subgroups are ag
ain of the same type\, and make precise in\nwhich sense and to what extent
this property is exclusive to the\nclassical types of Coxeter groups. As
the main tool for the proof we\nuse Solomon’s descent algebra. Using S
tirling numbers\, we express\ncertain basis elements of the descent algebr
a as polynomials and\nderive explicit multiplication formulas for a commut
ative subalgebra\nof the descent algebra. This is joint work with Linus H
ellebrandt.\n\nCoffee/tea/cakes/biscuits will be served in ADBG022 from 3:
30.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/40/
END:VEVENT
BEGIN:VEVENT
SUMMARY:John Grant McLoughlin (University of New Brunswick)
DTSTART:20221103T160000Z
DTEND:20221103T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/41
DESCRIPTION:Title: Mathematical Logic Puzzles on a Grid\nby John Grant M
cLoughlin (University of New Brunswick) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThe starting
point is a recently published collection authored by Susan Milner. The re
source is freely available through the Canadian Mathematical Society as pa
rt of the ATOM (A Taste of Mathematics) Series.\n\nhttps://cms.math.ca/wp-
content/uploads/2022/10/ATOM-XVII-Mathematical-Logic-Puzzles-on-a-Grid-1.p
df\n\nThe grid theme will carry forward with a subsequent blend of recreat
ional mathematical ideas and problems offered in a playful spirit. Adaptab
ility is a thread woven through the selection as variations or shifts in t
he problems posed may lend themselves to engaging people across the spectr
a of age and mathematical backgrounds. Simply bring along some curiosity.\
n\nContact: Aisling McCluskey\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/41/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michel Destrade (University of Galway)
DTSTART:20221110T160000Z
DTEND:20221110T170000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/42
DESCRIPTION:Title: Acoustic evaluation of material parameters\, stresses\, a
nd strains in soft solids\nby Michel Destrade (University of Galway) a
s part of Maths seminars at the University of Galway\n\nLecture held in A
DB1020.\n\nAbstract\nThis talk discusses two non-destructive evaluation ai
ms that can be achieved with elastic waves travelling in soft materials. \
nFirst\, we see how tracking the changes in wave speed with stress or stra
in gives access to linear and nonlinear material parameters. These can the
n be used to design biomaterials or to create meaningful Finite Element si
mulations. Examples include brain matter\, muscles\, and stretched soft pl
ates.\nThen\, we find that the state of stress and strain existing in a lo
aded material can be accessed directly from wave speed measurements\, with
out having to determine\, or even know\, its material properties. These te
chniques are expected to have important applications in health monitoring
of loaded structures. Examples include stressed rail steel\, muscle\, and
thin membranes such as a stretched rubber sheet\, a piece of cling film (~
10 μm thick) and the animal skin of a bodhrán\, a traditional Irish drum
.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/42/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zdenka Guadarrama (Rockhurst University\, Missouri)
DTSTART:20221110T120000Z
DTEND:20221110T130000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/43
DESCRIPTION:Title: The E-Guadarrama Museum of ART in Math Teaching\nby Z
denka Guadarrama (Rockhurst University\, Missouri) as part of Maths semina
rs at the University of Galway\n\nLecture held in CELT seminar room AMB10
06.\n\nAbstract\nThroughout my teaching career\, I have taken an opportuni
ty to use art as the medium to engage students in doing mathematics. Stud
ents’ active engagement in the “doing of mathematics” in the classro
om is achieved through carefully crafted inquiry activities\, class projec
ts\, and meaningful assessments. Undergraduate research and community enga
gement provide opportunities for students to showcase their math-art work
outside of the classroom. Through a guided tour of the galleries in the E-
Guadarrama Museum of ART in Math Teaching\, I will share examples of art a
s a medium for mathematics in a variety of classes in the undergraduate cu
rriculum\, in different parts of the learning cycle\, and as motivation fo
r community projects. I hope this museum visit will inspire you to bring a
rt into your math teaching.\n\nHost: CELT\nOrganized by Dr. Mairead Green
e in CELT\nContact: Aisling McCluskey\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/43/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sultan Alzahrani (University of Galway)
DTSTART:20221109T120000Z
DTEND:20221109T130000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/46
DESCRIPTION:Title: Explicit Computations of Ask Zeta Functions\nby Sulta
n Alzahrani (University of Galway) as part of Maths seminars at the Unive
rsity of Galway\n\nLecture held in ADB1020.\nAbstract: TBA\n\nTea/coffee a
nd sandwiches will be available from 12.45 in ADB-G022 (tea room).\nPhD vi
va talk.\nContact: Tobias Rossmann\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/46/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dana Saleh (University of Galway)
DTSTART:20221219T100000Z
DTEND:20221219T110000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/47
DESCRIPTION:Title: PhD viva talk: 2-uniform covering groups of elementary ab
elian 2-groups\nby Dana Saleh (University of Galway) as part of Maths
seminars at the University of Galway\n\nLecture held in ADB1020.\nAbstrac
t: TBA\n\nLocation: AdB-1020 and online at https://nuigalway-ie.zoom.us/j
/95817018456?pwd=allZRXgrUG9sMUJ3YlhOYVBtTlUzdz09 Passcode: 238665\n\nThe
talk will be followed by coffee in the research room (AdB-G022) at 10.30 a
pprox.\n\nContact: Rachel Quinlan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/47/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stephan Rudykh (University of Galway)
DTSTART:20230202T150000Z
DTEND:20230202T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/48
DESCRIPTION:Title: Magnetoactive elastomers: Micromechanics\, instabilities\
, and pattern formations\nby Stephan Rudykh (University of Galway) as
part of Maths seminars at the University of Galway\n\nLecture held in ADB
1020.\n\nAbstract\nMagnetoactive elastomers (MAE) can change their shape a
nd properties when excited by an external magnetic field. In this work\, w
e study the nonlinear behavior of magnetoactive elastomers in the framewor
k of large deformations coupled with magnetic fields. We analyze the role
of the microstructures in the overall performance and stability of the sof
t active composites. We examine the coupled behavior of the active composi
tes with (i) periodically and (ii) randomly distributed active particles e
mbedded in a soft matrix [1]\, and (iii) periodic laminate composites and
anisotropically structured composites with chain-like structures [2-4]. We
identify the key parameters governing the magneto-mechanical couplings. M
oreover\, we find advantageous microstructures that significantly enhance
the coupling and actuation of the active materials [1]. Furthermore\, we s
how that even very similar microstructures\, such as periodic composites w
ith hexagonal and rectangular representative volume elements\, exhibit ver
y different behavior in terms of their actuation and effective properties
[1]. Next\, we investigate the coupled magneto-elastic instabilities in MA
E. These instabilities may occur at different length scales [3\, 5]\, and\
, potentially\, they may be exploited to achieve new functionalities such
as tunable elastic wave band-gaps [6\, 7\, 8].\n\nWe explore the role of e
xternal magnetic fields\, microstructure parameters\, and consentient prop
erties on the multiscale instabilities. Finally\, the ideas will be illust
rated by our recent experimental results on instabilities in magnetoactive
laminate [9] and particulate composites [5].\n\n\n\nREFERENCES\n\n[1] E.
Galipaeu et al.\, Magnetoactive elastomers with periodic and random micros
tructures. Int. J. Solids. Struct.\, 51\, 3012-3024\, 2014.\n\n[2] S. Rudy
kh and K. Bertoldi\, Stability of anisotropic magnetorheological elastomer
s in finite deformations: A micromechanical approach. J. Mech. Phys. Solid
s\, 61\, 949-967\, 2013.\n\n[3] P. Pathak et al.\, Magnetoelastic instabil
ities in soft laminates with ferromagnetic hyperelastic phases. Int. J. Me
ch. Sciences\, 213\, 106862\, 2022.\n\n[4] A. Goshkoderia and S. Rudykh\,
Stability of magnetoactive composites with periodic microstructures underg
oing finite strains in the presence of a magnetic field. Composites Part B
\, 128\, 19-29\, 2017.\n\n[5] A. Goshkoderia et al.\, Instability-induced
pattern formations in soft magnetoactive composites. Phys. Rev. Lett.\, 12
4\, 158002\, 2020.\n\n[6] N. Karami-Mohammadi et al.\, Soft magnetoactive
laminates: large deformations\, transverse elastic waves and band gaps tun
ability by a magnetic field J. Appl. Mech.\, 86\, 111001\, 2019.\n\n[7] Q.
Zhang and S. Rudykh\, Magneto-deformation and transverse elastic waves in
hard-magnetic soft laminates. Mech. Materials 169\, 104325\, 2022.\n\n[8]
Q. Zhang et al.\, Magnetic field-induced asymmetric mechanical metamateri
als. Extreme Mechanics Letters 59\, 101957\, 2023.\n\n[9] V. Chen et al. M
echanical instability tuning of a magnetorheological elastomer composite l
aminate. Composites Part B 251\, 110472\, 2023.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/48/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shane Whelan (UCD School of Mathematics & Statistics)
DTSTART:20230302T150000Z
DTEND:20230302T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/50
DESCRIPTION:Title: Mortality and Longevity in Ireland\nby Shane Whelan (
UCD School of Mathematics & Statistics) as part of Maths seminars at the
University of Galway\n\nLecture held in AC202.\n\nAbstract\n(Note the non-
standard location. This talk will take place in the Arts and Science Conco
urse.)\n\nShane will take us through some of the highlights of the researc
h in his recent book\, Mortality and Longevity in Ireland\, recently publi
shed by Dublin University Press with the support of the Society of Actuari
es in Ireland. The talk will be an informal overview\, focussing on some i
mportant issues with those interested in the detail directed to the differ
ent chapters.\n \nShane will attempt to answer two questions:\n\n* How lon
g can those now alive in Ireland expect to live?\n\n* How long can their c
hildren expect to live?\n\nHe will overview official mortality forecasts (
on which he advises the CS0). A simple two-parameter model that well descr
ibed late-life mortality will be outlined. He will mention stochastic appr
oaches and show how to build scenarios under a deterministic model\, with
associated probability levels. He will discuss the wisdom\, or not\, of re
lying on longevity forecasts to change the State retirement age. Putting a
value on human life\, he will review how actuaries estimate lump sum comp
ensation for future loss. Finishing on a much-needed action\, he highligh
ts that compensation for negligence in the delivery of maternity services
in Ireland is now higher than its day-to-day running costs and persistent
recommendations for reform of the services remain unimplemented. \n\n\nDr
Shane Whelan is an actuary and Associate Professor in UCD School of Mathem
atics & Statistics\, and former Head of the Department of Statistics & Act
uarial Science. He was the managing editor of the British Actuarial Journa
l for several years and served on councils of the actuarial profession bot
h in Ireland and the UK. He has been a member of the Central Statistics Of
fice (CSO) Expert Group on Population Projections since 2007\, was a membe
r of the Pension Council of Ireland\, and has assisted the High Court in d
etermining damages in precedent-setting catastrophic personal injury cases
. Much of his research is available at www.shanewhelan.org.\n\nNote the no
n-standard location. This talk will take place in the Arts and Science Con
course.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/50/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr Gibran Hemani (Bristol Medical School)
DTSTART:20230511T140000Z
DTEND:20230511T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/53
DESCRIPTION:Title: The future of genetic biobanks\nby Dr Gibran Hemani (
Bristol Medical School) as part of Maths seminars at the University of Ga
lway\n\nLecture held in ADB1020.\n\nAbstract\nGenetic epidemiology aims to
unravel the genetic factors influencing disease\, with broad real world g
oals of a) predicting disease risk among individuals in the population\, a
nd b) better identifying modifiable molecular and behavioural intervention
s to prevent and treat disease. Over the past decade we have witnessed an
extraordinary leap in sample sizes of epidemiological cohorts with genotyp
e or DNA sequence data driving this endeavour. Our current phase of bioban
ks in the UK is now in the process of recruiting 5 million participants\,
linking their genetic information to rich medical health records. In this
talk I will describe what necessitates this scale of genetic data\, and th
en discuss some statistical challenges - in particular several population
phenomena that bias genetic associations are exacerbated as population-bas
ed sample sizes grow. An interesting remedy lies in over-sampling complete
families to harness the natural randomisation process in genetic inherita
nce to improve statistical inference.\n\nContact: John Ferguson\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/53/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Raimondo Penta (University of Glasgow)
DTSTART:20230323T150000Z
DTEND:20230323T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/54
DESCRIPTION:Title: Poroelasticity derived via asymptotic homogenization - Ma
thematical modelling and numerical simulations.\nby Raimondo Penta (Un
iversity of Glasgow) as part of Maths seminars at the University of Galwa
y\n\nLecture held in ADB1020.\n\nAbstract\nPoroelasticity derived via asym
ptotic homogenization - Mathematical modelling and numerical simulations.
State of the art\, further perspectives\, and extension to poroelastic com
posites \n\nThe mechanical behavior of a solid elastic structure interplay
ing with fluid percolating its pores can be studied via the Theory of Poro
elasticity. There exists a large variety of scenarios of interest that can
be treated by means of a poroelastic modeling approach\, including soil m
echanics\, (bio) artificial constructs and biological tissues\, such as bo
ne\, organs\, healthy and malignant (tumorous) cell aggregates. Here\, we
(a) revisit the equations of poroelasticity derived via asymptotic homogen
ization [I]\, (b) focus on recent applications of the theory [II\, V]\, an
d (c) we discuss recent advances on the subject which are relevant for lin
ear and nonlinear poroelastic composites [III\, IV]. These latter are mate
rials where the average distance between the various matrix constituents i
s comparable with the porescale. \n\nReferences: \n\n[I] Burridge\, Robert
\, and Joseph B. Keller. Poroelasticity equations derived from microstruct
ure\; The Journal of the Acoustical Society of America 70.4 (1981): 1140-1
146. \n\n[II] Dehghani\, H.\, R. Penta\, and J. Merodio. The role of poros
ity and solid matrix compressibility on the mechanical behavior of poroela
stic tissues\; Materials Research Express 6.3 (2018): 035404. \n\n[III] Mi
ller\, Laura\, and Raimondo Penta. "Effective balance equations for poroel
astic composites." Continuum Mechanics and Thermodynamics (2020): 1-25. \n
\n[IV] Miller\, Laura\, and Raimondo Penta. "Homogenized Balance Equations
for Nonlinear Poroelastic Composites." Applied Sciences 11.14 (2021): 661
1. \n\n[V] Dehghani\, H.\, Noll\, I.\, Penta\, R.\, Menzel\, A.\, & Merodi
o\, J. (2020). The role of microscale solid matrix compressibility on the
mechanical behaviour of poroelastic materials. European Journal of Mechani
cs-A/Solids\, 83\, 103996.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/54/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael McGettrick (University of Galway)
DTSTART:20230330T140000Z
DTEND:20230330T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/55
DESCRIPTION:Title: An overview of Quantum Game Theory\nby Michael McGett
rick (University of Galway) as part of Maths seminars at the University o
f Galway\n\nLecture held in ADB1020.\n\nAbstract\nI will present an overvi
ew of quantum games from its initial formulation (David Meyer\, 1999\, arX
iv:quant-ph/9804010) to current developments. In much the same way that qu
antum computing has revolutionized (parts of) classical computing\, quantu
m game theory is rapidly revolutionizing (classical) game theory. In this
(non-exhaustive) presentation\, I will describe in some detail some specif
ic examples\, so that it is hoped the audience will get an appreciation of
what is fundamentally different about the quantum approach. Specifically\
, I will describe the PQ Penny Flip game\, the quantum Prisoners Dilemma\,
and the celebrated CHSH game. I identify in each case the quantum nature
of the game\, the role of quantum operations (Unitary matrices)\, and the
use of entangled quantum states as a resource. We see in some cases the qu
antum version of the classical game has different (Nash) equilibria\, whil
e in other cases the use of shared entanglement can increase the winning p
robability (in cooperative games). In the talk\, no assumption is made of
familiarity with quantum mechanics / physics\, the theory is presented mat
hematically. (In any case - essentially quantum mechanics is (arguably) pr
obability theory using the L2 norm….)\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/55/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Peter Smith (Victoria University of Wellington\, New Zealand)
DTSTART:20230413T140000Z
DTEND:20230413T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/56
DESCRIPTION:Title: Mobility Models for Unmanned Aerial Vehicles (UAVs or dro
nes)\nby Peter Smith (Victoria University of Wellington\, New Zealand)
as part of Maths seminars at the University of Galway\n\nLecture held in
ADB1020.\n\nAbstract\nWe develop a family of tractable models for UAV mob
ility. Based on a system of coupled stochastic differential equations\, th
e resulting models exhibit realistic trajectories and flexible covariance
structures\, making them suitable for both small scale and large scale app
lications. Closed form solutions for steady state and transient position d
istributions\, as well as position covariance\, are derived.\nThese result
s are subsequently used to obtain distance outage probabilities and pathlo
ss. The analytical results allow us to assess the impact of a variety of s
ystem parameters related to device control\, navigation and position measu
rement errors. Finally\, using measured UAV flight data\, we show an excel
lent goodness of fit between the proposed model and the data.\nI will also
give a brief overview of current work at VUW on reconfigurable intelligen
t surfaces and the fusion of radar sensing and communications.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/56/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr. Abolfazl Mohajer (University of Galway)
DTSTART:20230406T140000Z
DTEND:20230406T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/57
DESCRIPTION:Title: Smoothness of Hodge Loci and Applications\nby Dr. Abo
lfazl Mohajer (University of Galway) as part of Maths seminars at the Uni
versity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn this talk I
will discuss a recent conjecture (by Movasati) we are working on about the
Hodge loci in the moduli of smooth complex hypersurfaces. Consider the mo
duli of such hypersurfaces in $\\P^n$ which can be seen as the space of ho
mogeneous polynomials of degree $d$ and coefficients in $\\C$ of variables
$(x_0\,...\,x_{n+1})$. We consider a subvariety of this moduli space para
metrizing hypersurfaces containing two projective spaces as cycles both of
dimensions $n/2$. We consider the algebraic Hodge cycle resulting from th
is cycle and consider its deformation in the moduli space. In this way we
define a Hodge locus and one conjectures that this Hodge locus is smooth a
nd also that it is of codimension 1 in the intersection of the Hodge loci
of the original cycles. I discuss how this may contribute to Hodge conject
ure and also why it in its own right is an interesting problem. I will als
o discuss the progress that is being made in the problem.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/57/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Groups in Galway
DTSTART:20230518T140000Z
DTEND:20230518T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/58
DESCRIPTION:Title: Groups in Galway\nby Groups in Galway as part of Math
s seminars at the University of Galway\n\nLecture held in ADB1020.\nAbstr
act: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/58/
END:VEVENT
BEGIN:VEVENT
SUMMARY:School Research Day
DTSTART:20230420T090000Z
DTEND:20230420T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/59
DESCRIPTION:Title: School Research Day\nby School Research Day as part o
f Maths seminars at the University of Galway\n\nLecture held in Orbsen Bu
ilding.\n\nAbstract\nOur annual School Research Day takes place today\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/59/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Patrick Heslin (Maynooth University)
DTSTART:20230511T130000Z
DTEND:20230511T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/60
DESCRIPTION:Title: Hydrodynamics and Infinite-Dimensional Geometry\nby P
atrick Heslin (Maynooth University) as part of Maths seminars at the Univ
ersity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nSince the work o
f Kolmogorov\, Arnold\, Ebin and Marsden\, infinte-dimensional Riemannian
geometry has been a fruitful viewpoint from which to investigate hydrodyna
mics. I will begin with the development of these ideas in the '60s and '70
s\, before moving on to current work. In particular I will discuss geodesi
c equations framed as two-point boundary value problems and describe how t
his relates to the behaviour of Lagrangian solutions of the Euler equation
s of ideal hydrodynamics.\n\nContact: James Cruickshank\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/60/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alessandro Musesti (Università Cattolica del Sacro Cuore)
DTSTART:20230523T110000Z
DTEND:20230523T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/61
DESCRIPTION:Title: On the mathematical modeling of skeletal muscle tissue\nby Alessandro Musesti (Università Cattolica del Sacro Cuore) as part o
f Maths seminars at the University of Galway\n\nLecture held in ADB1020.\
n\nAbstract\n[Part of the Stokes Modelling Workshop]\n\nSkeletal muscle ti
ssue is the prevalent tissue constituting our body. It is an active materi
al\, that is a medium for which deformations can occur in absence of loads
\, given an external stimulus. In the talk I will introduce a mathematical
method used to model such materials. In a hyperelastic setting\, it will
be shown that it is possible to fit the parameters of the model to recover
experimental data.\n\nFinally\, we consider the loss of muscle performanc
e. We model it in two components\, both typical of a disease named sarcope
nia: the loss of muscle mass and the loss of activation. The former is enc
oded in the model by a percentage parameter which measures the fraction of
muscle fibres which are lost\; the latter is represented by a damage para
meter which reduces the active part of the stress by a given percentage. T
he lack of experimental data on the elastic properties of a sarcopenic mus
cle tissue does not allow any fitting of the two parameters\; however\, th
e proposed model can be numerically implemented using finite element metho
ds and different scenarios can be studied.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/61/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Filipa Peres (INL - International Iberian Nanotechnology Laborator
y)
DTSTART:20230427T140000Z
DTEND:20230427T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/62
DESCRIPTION:Title: An introduction to Pauli-based computation\nby Filipa
Peres (INL - International Iberian Nanotechnology Laboratory) as part of
Maths seminars at the University of Galway\n\nLecture held in ADB1020.\n\
nAbstract\nIn this talk\, I will discuss how universal quantum computation
can be achieved by performing only adaptive measurements of compatible\,
multi-qubit Pauli operators. This is a model of quantum computation known
as Pauli-based computation [1]. Additionally\, I will discuss how this fra
mework can be used to compile (universally general) Clifford+T quantum cir
cuits [1\,2] and to perform hybrid quantum-classical computation [1\,2].\n
To reach the talk’s goals I will start with a pedagogical introduction i
nto the Pauli and Clifford groups\, the stabilizer formalism and discuss b
riefly how to do magic state injection.\n\n[1] S. Bravyi\, G. Smith\, and
J. A. Smolin\, Trading Classical and Quantum Computational Resources\, Phy
s. Rev. X 6\, 021043 (2016).\n\n[2] F. C. R. Peres and E. F. Galvão\, Qua
ntum circuit compilation and hybrid computation using Pauli-based computat
ion (2022)\, arXiv:2203.01789.\n\nContact: Mark Howard\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/62/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Svetlana Petrenko (University College London)
DTSTART:20230525T140000Z
DTEND:20230525T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/63
DESCRIPTION:Title: Modelling of Silica Pattern Formation in Diatoms Using a
Continuum Approach\nby Svetlana Petrenko (University College London) a
s part of Maths seminars at the University of Galway\n\nLecture held in A
DB1020.\n\nAbstract\nDiatoms are unicellular photosynthetic algae that for
m their cell wall\, or frustule\, of diatoms is formed by silica depositio
n vesicle (SDV)\, within which the water-soluble silicic acid\, taken up b
y diatoms from the environment\, precipitates into amorphous silica. The f
rustule’s structured pattern is specific to each species of the diatoms.
Furthermore\, silaffins are specialized proteins that form silicon oxide
into nanospheres. Silaffins as well as LCPAs are both contained in SDV. Ad
ditionally\, phosphate ions play a crucial role in the phase separation of
the organic component. In this talk\, a phase separation model is used to
study the formation of aggregates of organic molecules. Thus\, we can ass
ume that an organic template may be guide of the silica structure formatio
n. The model couples phase separation with chemical reaction the resulting
dissociation into two components. Numerical simulations are employed to i
nvestigate the development of regular stationary patterns. The obtained re
sults show that the choice of Gibbs free energy has significant impact on
the morphology of the pattern. Varying concentration\, initial and boundar
y conditions can lead to a range of different structures. The talk will al
so address the influence of the growing domain on pattern formation.\n\nCo
ntact: Stephan Rudykh\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/63/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nicola Fitz-Simon (University of Galway)
DTSTART:20230524T130000Z
DTEND:20230524T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/64
DESCRIPTION:Title: Mathematical and statistical modelling for the covid-19 p
andemic in Ireland\nby Nicola Fitz-Simon (University of Galway) as par
t of Maths seminars at the University of Galway\n\nLecture held in ADB102
0.\n\nAbstract\n[Part of the Stokes Modelling Workshop]\n\nDuring the covi
d-19 pandemic\, together with collaborators in Galway and France\, I was u
sing mathematical and statistical models to try to understand and predict
the epidemiological dynamics of the disease. In this talk I will explain
how we developed a mathematical model to predict accurately the short-term
dynamics of covid-19\, and which we fitted to longitudinal disease outcom
e data from Ireland. I will discuss statistical challenges such as collec
ting appropriate data\, and using the data to estimate the model parameter
s and quantify uncertainty via a Bayesian approach. Finally I will descri
be how we used the model to make counterfactual predictions of what might
have happened under different interventions to control the spread of the v
irus.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/64/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr. Mikhail Poluektov (The University of Dundee\, UK)
DTSTART:20230804T140000Z
DTEND:20230804T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/65
DESCRIPTION:Title: Propagation and stability of stress-affected transformati
on fronts in solids\nby Dr. Mikhail Poluektov (The University of Dunde
e\, UK) as part of Maths seminars at the University of Galway\n\nLecture
held in ADB1020.\n\nAbstract\nThere is a wide range of problems in continu
um mechanics that involve transformation fronts\, which are non-stationary
interfaces between two different phases in a phase-transforming or a chem
ically-transforming material. From the mathematical point of view\, the co
nsidered problems are represented by systems of non-linear PDEs with disco
ntinuities across non-stationary interfaces\, kinetics of which depend on
the solution of the PDEs. Such problems have a significant industrial rele
vance – an example of a transformation front is the localised stress-aff
ected chemical reaction in Li-ion batteries with Si-based anodes. Since th
e kinetics of the transformation fronts depends on the continuum fields\,
the transformation front propagation can be decelerated and even blocked b
y the mechanical stresses. This talk will focus on three topics: (1) the s
tability of the transformation fronts in the vicinity of the equilibrium p
osition for the chemo-mechanical problem\, (2) a fictitious-domain finite-
element method (CutFEM) for solving non-linear PDEs with transformation fr
onts and (3) an applied problem of Si lithiation.\n\nContact: Stephan Rudy
kh\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/65/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr. Abolfazl Mohajer (University of Galway)
DTSTART:20230921T140000Z
DTEND:20230921T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/66
DESCRIPTION:Title: Galois Coverings of Curves and Their Families\nby Dr.
Abolfazl Mohajer (University of Galway) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nWe describe
Galois covers of algebraic curves and their families by using the eigensp
aces of local systems associated to push-forward of sheaves by the structu
re morphism. More precisely\, if $f:C\\to Y$\, we consider the sheaves $f_
*(\\C)$. The group action by the Galois group $G$\, yields a decomposition
of this sheaf into irreducible local systems corresponding to irreducible
representations of the group $G$. If $\\rho$ is such an irreducible repre
sentation\, the eigensheaf $L_{\\rho}$ of $f_*(\\C)$ gives rise to another
useful sheaf which is related to the homology group $H_1(C\,\\C)$. Using
this\, we describe the action of the Galois group $G$ on the homology grou
p. As a particular example\, we study the Dihedral covers of $\\P^1$.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/66/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Tuite (University of Galway)
DTSTART:20230928T140000Z
DTEND:20230928T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/68
DESCRIPTION:Title: New Applications of Bers Quasiforms on Riemann Surfaces\nby Michael Tuite (University of Galway) as part of Maths seminars at t
he University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nBers qua
siforms were introduced in the 1960s in order to construct potential funct
ions for holomorphic differential forms on a Riemann surface of genus $g>1
$. I will discuss some background ideas and two novel applications concern
ing general meromorphic forms:\n\n\n \n(I) the expansion of any such gener
al form in terms of Bers quasiforms and \n\n(II) a canonical differential
operator which acts on the space of such forms. \n\nThe talk is aimed at a
general audience with familiarity of standard complex analysis. The talk
is based on joint work with Michael Welby.\n\nCoffee/tea/cakes/biscuits wi
ll be served in ADBG022 from 2:30pm\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/68/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Conall Kelly (University College Cork)
DTSTART:20231102T150000Z
DTEND:20231102T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/69
DESCRIPTION:Title: Numerical solution of nonlinear stochastic systems with j
ump perturbations.\nby Conall Kelly (University College Cork) as part
of Maths seminars at the University of Galway\n\nLecture held in ADB1020.
\n\nAbstract\nConsider a $d$-dimensional system of Itô-type stochastic di
fferential equations with $m$ independent diffusions where the drift and d
iffusion coefficients are not globally Lipschitz continuous but instead on
ly locally Lipschitz and together satisfy a Khasminskii-type condition. It
is known that both the explicit Euler-Maruyama and Milstein schemes fail
to converge for such systems when applied over a uniform mesh.\n\nWe const
ruct an adaptive mesh that responds to the local behaviour of solutions by
reducing the stepsize as solutions approach the boundary of a sphere\, in
voking a convergent backstop method in the (rare) event that the timestep
becomes too small. With such a mesh\, order-one strong $L_2$-convergence o
f the scheme can be ensured\, even when the diffusion coefficients of the
SDE are non-commutative.\n\nWe examine how this adaptive strategy can be m
odified to allow for the discretisation of systems of SDEs perturbed by a
Poisson jump process independent of the perturbing diffusion processes\, w
ithout loss of order\, as long as the independent jump times can be pre-co
mputed and included in the adaptive mesh.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/69/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Katrin Wendland (Trinity College Dublin)
DTSTART:20240307T150000Z
DTEND:20240307T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/70
DESCRIPTION:Title: Symmetries of Z_3-orbifold K3s\nby Katrin Wendland (T
rinity College Dublin) as part of Maths seminars at the University of Gal
way\n\nLecture held in ADB1020.\n\nAbstract\nK3 surfaces are special compl
ex surfaces. Examples that are particularly\nwell understood are the so-ca
lled Kummer surfaces\, which may be\nobtained by orbifolding complex two-t
ori by the group Z_2. There exists an\nextensive body of literature on suc
h Kummer surfaces.\nIn joint work with K. Budzik\, A. Taormina\, M. Ungure
anu and I. Zadeh\,\nwe are generalizing these results from Kummer surfaces
to K3 surfaces\nthat are obtained as orbifolds of complex two-tori by the
group Z_3\, with\na particular interest in describing their symmetries co
nveniently.\nThe talk will give an introduction to the relevant techniques
and results on\nsuch Z_3-orbifold K3s.\n\nContact: Michael Tuite\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/70/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr Nicholas Moore
DTSTART:20231005T140000Z
DTEND:20231005T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/71
DESCRIPTION:Title: The Formation of Karst Pinnacles\nby Dr Nicholas Moor
e as part of Maths seminars at the University of Galway\n\nLecture held i
n ADB1020.\n\nAbstract\nRecent experiments demonstrate how dissolution\, i
n conjunction with gravitationally-induced convective flows\, can create s
harp geometric features. These laboratory-created structures give insight
into geological features known as karst pinnacles. A new computational app
roach\, specially tailored to the hyberbolic nature of the underlying PDEs
\, reveals convergence to a morphological attractor with high\, yet finite
\, tip curvature. These results reverse previous hypotheses on shock forma
tion (i.e. finite-time blowup of tip curvature)\, agree well with laborato
ry experiments\, and enable simple estimates for the age of geological str
uctures.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/71/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ted Hurley
DTSTART:20231109T150000Z
DTEND:20231109T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/73
DESCRIPTION:Title: What are your favourite matrices? Why? What are your favo
urite *types* of matrices? How are they made and for what purpose?\nb
y Ted Hurley as part of Maths seminars at the University of Galway\n\nLec
ture held in ADB1020.\n\nAbstract\nMatrices are built and designed by app
lying procedures from lower order matrices. Matrix tensor products\, dire
ct sums or multiplication of matrices are such procedures and a matrix bui
lt from these is said to be a $\\textit{separable}$ matrix. A ${\\textit
non-separable}$ matrix is a matrix which is not separable and is often re
ferred to as $\\textit{an entangled matrix}$. The matrices built may ret
ain properties of the lower order matrices or may also acquire new desire
d properties not inherent in the constituents. \n\nHere we discuss desig
n methods for non-separable matrices. The matrices to be designed may need
to be of a particular type or for a specific purpose or application. . \n
\nNon-separable matrices of required types are required for applications
and other uses\; they can capture the structure in a unique way and thus
perform much better than separable matrices. As time allows\, I will dis
cuss non-separable constructions of unitary\, (and paraunitary matrices to
be explained) and matrices for information systems such as for filter ban
ks\, coding theory and other signal processing processes.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/73/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Noor Kherrah (PhD Viva) (University of Galway)
DTSTART:20231117T100000Z
DTEND:20231117T110000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/75
DESCRIPTION:Title: Differences in immunogenicity between cancer mutation sig
natures shed light on immunoediting\nby Noor Kherrah (PhD Viva) (Unive
rsity of Galway) as part of Maths seminars at the University of Galway\n\
nLecture held in ADB1020.\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/75/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nina Snigireva (University of Galway)
DTSTART:20240111T150000Z
DTEND:20240111T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/76
DESCRIPTION:Title: Properties of Polynomials on Banach Lattices\nby Nina
Snigireva (University of Galway) as part of Maths seminars at the Univer
sity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn this talk we wi
ll discuss properties of $m$-homogeneous polynomials which are specific to
Banach lattices. In particular\, in this setting we can consider order c
onvergence which leads naturally to the definition of order continuous pol
ynomials. These important concepts allow us to extend some results for lin
ear operators on Banach lattices to the nonlinear case of $m$-homogenous p
olynomials. We will also consider the regular norm for homogeneous polynom
ials and show how it differs from the classical supremum norm.\n\nThis is
joint work with C. Boyd and R. Ryan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/76/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Brendan Masterson (Middlesex University London)
DTSTART:20240215T150000Z
DTEND:20240215T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/77
DESCRIPTION:Title: Authenticity in Learning\, Teaching and Assessment.\n
by Brendan Masterson (Middlesex University London) as part of Maths semina
rs at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nM
iddlesex University has a practice-based approach supporting students to d
evelop the knowledge and skills they need for their professional careers.
Taking this as our guiding principle while revalidating our maths programm
es we decided to rethink our learning teaching and assessment strategies.
This involved moving away from traditional mathematical teaching methodolo
gies towards a more inclusive and authentic approach while maintaining the
necessary rigour for a mathematics degree.\nTo prepare students for their
mathematical careers we embed a number of techniques that allow them to d
evelop particular employability skills throughout their degree. These incl
ude the use of industry standard tools in class and a module dedicated to
problem-solving and communication. We also distinguish between authentic a
ssessment\, that is submission formats that are closely aligned with work
tasks\, and authentic problems\, which use real data\, complicated real-li
fe models or the kind of imprecise formulation that typifies real-world pr
oblems. \nIn this talk I will discuss our rationale for this approach to l
earning and teaching\, I will give examples of our assessment approach and
how we mitigate against the barriers to equality of opportunity that this
approach has made explicit.\n\nContact: Kirsten Pfeiffer\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/77/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joshua Maglione (University of Galway)
DTSTART:20240208T150000Z
DTEND:20240208T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/79
DESCRIPTION:Title: Categorifying characteristic subgroups: a characterizatio
n\nby Joshua Maglione (University of Galway) as part of Maths seminars
at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nMot
ivated by isomorphism testing of groups and algebras\, we study characteri
stic subgroups and structures that are invariant under automorphisms more
broadly. Sticking with groups for simplicity\, we prove that characteristi
c subgroups both give rise to and come from biaction homomorphisms of cate
gories acting on categories. The primary corollary of this is a roadmap to
find new characteristic subgroups: build bridges between the category of
groups and other categories. We demonstrate this by categorifying classica
l characteristic subgroups.\n\nThis is joint with P. A. Brooksbank\, H. Di
etrich\, E. A. O'Brien\, and J. B. Wilson.\n\nContact: Davood & Mark\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/79/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leo Creedon (ATU Sligo)
DTSTART:20240222T150000Z
DTEND:20240222T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/80
DESCRIPTION:Title: The ring of derivations of a group algebra\, and new par
tial algebraic structures which are almost semigroups\, groups and rings\nby Leo Creedon (ATU Sligo) as part of Maths seminars at the Universit
y of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIt is well known that
the derivations of an associative algebra form a Lie algebra. It is rarel
y the case that this set of derivations forms an associative algebra. In t
his talk the finitely generated group algebras whose derivations form an a
ssociative algebra are fully determined. Necessary and sufficient conditio
ns on a group algebra of a finitely generated group G over a finite field
K are determined such that the set of derivations of the group algebra for
m an associative K-algebra. \n \nSince the composition of derivations is r
arely a derivation\, this motivates the following question: what (non Lie)
algebraic structure do derivations have? This leads to the definition of
new partial algebraic systems called ringlets (not quite rings)\, grouplet
s (not quite groups)\, and semigrouplets (not quite semigroups)\, as well
as related ideas of p…lets\, sub…lets\, idealets\, and quotient pringl
ets. Derivations of associative algebras give examples of such structures.
\n \nThis is joint work with Kieran Hughes.\n\nContact: Nina Snigireva\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/80/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rachel Quinlan (University of Galway)
DTSTART:20240314T150000Z
DTEND:20240314T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/81
DESCRIPTION:Title: Curiosities of Alternating Sign Matrices\nby Rachel Q
uinlan (University of Galway) as part of Maths seminars at the University
of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThis talk will report
on some activity from my period of sabbatical leave in the second half of
2023. It will start with a little of the lore of alternating sign matrices
(ASMs)\, and some of the (surprising) reasons for interest in these combi
natorial objects. Then we will discuss some work in progress (jointly with
Cian O'Brien) on ASMs with special algebraic or matrix-theoretic properti
es\, including idempotence and finite multiplicative order.\n\nContact: Da
vood Roshan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/81/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mehakpreet Singh (University of Limerick)
DTSTART:20240328T150000Z
DTEND:20240328T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/82
DESCRIPTION:Title: Efficient Mass-Preserving Finite Volume Approach for the
Rennet-Induced Coagulation Equation\nby Mehakpreet Singh (University o
f Limerick) as part of Maths seminars at the University of Galway\n\nLect
ure held in ADB1020.\n\nAbstract\nThe coagulation of casein micelles cause
d by enzymes is a critical step in the dairy industry for cheese manufactu
re. During enzymatic coagulation of milk\, three processes occur: enzymic
proteolysis\, coagulation\, and gelation. This study presents the first nu
merical approach based on a finite volume scheme for describing the enzyme
-induced coagulation of casein micelles. The finite volume scheme is mainl
y concerned with ensuring mass conservation and developed on the assumptio
n that the particles are concentrated on the mean of each cell of the disc
retisation. The key advantages of the new technique are its simple mathema
tical formulation and its robustness that allow it to be implemented on an
y type of grid and tailored to different coagulation kernels. The accuracy
of the new approach is compared with newly derived analytical results for
several gelling and non-gelling coagulation kernels. The comparison demon
strates that the new approach closely matches the exact results. In order
to analyse the convergence behaviour of different order moments\, various
refined non-uniform grids have been taken into consideration.\n\nContact:
Niall Madden\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/82/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Robert Osburn (University College Dublin)
DTSTART:20240130T150000Z
DTEND:20240130T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/83
DESCRIPTION:Title: Strange identities\, the Habiro ring and resurgence\n
by Robert Osburn (University College Dublin) as part of Maths seminars at
the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn 1997
\, Kontsevich introduced a curious expression which does not converge on a
ny open subset of the complex numbers\, but is well-defined at a root of u
nity. Moreover\, it is an element of the Habiro ring which satisfies a "st
range identity" due to Zagier. In this talk\, we discuss resurgence proper
ties for the Borel transform of elements in the Habiro ring which satisfy
a general type of strange identity. As an application\, we discuss evidenc
e in relation to conjectures in quantum topology due to Costin and Garoufa
lidis. This is joint work with Samuel Crew and Ankush Goswami.\n\nContact:
Michael Tuite\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/83/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Victoria Sánchez Muñoz (University of Galway)
DTSTART:20240125T150000Z
DTEND:20240125T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/84
DESCRIPTION:Title: How Maths Helped Me to Annoy My Insurance Company\nby
Victoria Sánchez Muñoz (University of Galway) as part of Maths seminars
at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn
this talk I will tell the full story behind the article “The Estimation
of Wind Speed: Challenging the Insurance Company’s Decision”\, awarded
with the Graham Hoare Prize 2022 by the Institute of Mathematics and Its
Applications (IMA) in the UK. Long story short: the insurance company refu
sed to cover some damages on a blind caused by the wind but my researcher
side did not agree so I challenged their decision using some very basic ma
ths and physics.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/84/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Damian Markham (Sorbonne University)
DTSTART:20240229T153000Z
DTEND:20240229T163000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/85
DESCRIPTION:Title: Secure Networks of Quantum Sensors\nby Damian Markham
(Sorbonne University) as part of Maths seminars at the University of Gal
way\n\nLecture held in ADB1020.\n\nAbstract\nQuantum sensors allow for mor
e sensitivity than their classical counterparts. Entangling quantum sensor
s in a network allows for further advantages in efficiency of sensing for
global features (such as average phase or gradient)\, and in security.\nWe
will discuss some recent results in this direction.\n\nContact: Michael M
cGettrick\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/85/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lydia King (University of Galway)
DTSTART:20240130T093000Z
DTEND:20240130T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/86
DESCRIPTION:Title: The Role of Genomic Data in Stratifying Patients within P
redictive Models for Breast Cancer Survival Outcome\nby Lydia King (Un
iversity of Galway) as part of Maths seminars at the University of Galway
\n\nLecture held in ADB1020.\nAbstract: TBA\n\nContact: Emma Holian\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/86/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Doireann O'Kiely (University of Limerick)
DTSTART:20240425T140000Z
DTEND:20240425T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/87
DESCRIPTION:Title: Moving out of plane: wrinkling and buckling\nby Doire
ann O'Kiely (University of Limerick) as part of Maths seminars at the Uni
versity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThin structures
typically buckle out of plane when compressed\, giving rise to a myriad o
f shapes. These range from classic Euler buckling to honey coiling to mic
roscale wrinkling patterns\, and can occur in both fluid and solid systems
. Some of these situations correspond to a ''failure''\, but others may b
e exploited for applications such as flexible electronics. \n\n \n\nIn t
his talk I will introduce some examples of buckling and wrinkling mechanis
ms\, discussing their uses and the corresponding challenges. I will intro
duce mathematical models for addressing these challenges\, discussing the
new insights gained and some open questions.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/87/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hannah Conroy Broderick (University College Dublin)
DTSTART:20240418T140000Z
DTEND:20240418T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/88
DESCRIPTION:Title: A simple formula for determining in vivo stress differenc
e in human skin\nby Hannah Conroy Broderick (University College Dublin
) as part of Maths seminars at the University of Galway\n\nLecture held i
n ADB1020.\n\nAbstract\nSkin is the largest organ in the human body and is
responsible for many important functions\, including acting as the body's
initial line of defense. It is under a constant state of tension in the b
ody\, and this tension plays a critical role in surgical outcomes. Common
scar management guidelines state that incisions should be made parallel to
the maximal tension\, however there is currently no accepted way to measu
re this tension in a clinical setting non-destructively\, with surgeons ty
pically relying on qualitative techniques and their own experience. Here\,
we develop a technique to measure the stress difference in the body using
an acoustic measurement technique that relies on a simple analytic formul
a.\n\nWe derive a simple formula from the acoutoelastic theory that relate
s the stress difference to the wave velocities\, with a known given error.
We validate this formula computationally using Finite Element simulations
and find that the formula can predict the stress difference accurately in
a variety of situations. Final validation is carried out experimentally o
n synthetic tissue phantoms\, where we find very good agreement with the s
imple formula. The proposed formula is universal and will enable on-demand
patient-specific measurement of stress in skin in a simple non-invasive m
anner.\n\nThis is joint work with Wenting Shu\, Michel Destrade and Aislin
g NÃ Annaidh.\n\nContact: Michel\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/88/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Victoria Sánchez Muñoz (University of Galway)
DTSTART:20240301T110000Z
DTEND:20240301T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/89
DESCRIPTION:Title: Boolean games played in a triangle using bi-partite and t
ri-partite entanglement\nby Victoria Sánchez Muñoz (University of Ga
lway) as part of Maths seminars at the University of Galway\n\nLecture he
ld in AMB-G065 (Arts Millenium but by the School of Psychology).\n\nAbstra
ct\nI will briefly introduce the research conducted during my PhD\, which
focused on studying Boolean games when played by three players in a triang
le network configuration. The players share two 3-qubit quantum states and
three 2-qubit quantum states\; the aim is comparing these two types of qu
antum resources in such a scenario.\n\nContact: Michael McGettrick\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/89/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Brian O’Sullivan (University of Galway)
DTSTART:20240222T093000Z
DTEND:20240222T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/90
DESCRIPTION:Title: Computational approaches to identify and explain sources
of error in cancer somatic mutation data\nby Brian O’Sullivan (Unive
rsity of Galway) as part of Maths seminars at the University of Galway\n\
nLecture held in ADB1020.\n\nAbstract\nErrors in identifying somatic mutat
ions in cancer samples can have critical implications\, leading to missed
treatment opportunities or misleading research findings. We developed vcfV
iew\, an interactive Rshiny application\, to reevaluate variants excluded
from analysis\, allowing us to incorporate biological context into our ass
essment and identify overlooked putative somatic variants. Additionally\,
we developed a simulation framework to generate comprehensive and realisti
c tumour genomic sequencing data\, accurately representing the frequency p
rofile observed in real sequencing data and documenting the true source of
each non-reference base. The framework not only identifies variant caller
errors but also enables us to explain the reasons behind erroneous calls.
Using the GATK Mutect2 variant calling pipeline\, we apply this framework
to highlight and explain sources of error in somatic mutation data and bi
ases in somatic allele frequency estimation. Finally\, we apply these meth
ods to low-depth\, heavily DNA-damaged\, tumour-only sequencing data from
an unpublished cohort of 60 pancreatic cancer patients and recover clinica
lly and research-relevant information.\n\nContact: Cathal Seoighe\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/90/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Koushik Paul (University of Galway)
DTSTART:20240326T110000Z
DTEND:20240326T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/91
DESCRIPTION:Title: Novel Construction of Specht Modules for Monomial Groups<
/a>\nby Koushik Paul (University of Galway) as part of Maths seminars at t
he University of Galway\n\nLecture held in AMB-G066\, Psychology Wing\, A
rts Millennium Building.\n\nAbstract\nIn this PhD work\, I develop a new m
ethod to construct the Specht modules using Specht matrices for families o
f symmetric groups\, monomial groups and hyperoctahedral groups. Specht mo
dules appear in the representation theory of symmetric groups with the not
ions of Young symmetrizers and thereafter building the notions of polytabl
oids turn into basis of the Specht module corresponding to some partition
of a natural number. Here I develop a new combinatorial way to replace po
lytabloids by columns of Specht matrices corresponding to the standard tab
leaux. The set of such columns give rise to the basis of the Specht module
s. This new construction is very straight forward and easy to understand a
s it uses simple linear algebraic techniques such as solving system of lin
ear equations.\n\nContact: Gotz Pfeiffer\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/91/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Prof. Murray Aitkin (University of Melbourne)
DTSTART:20240509T140000Z
DTEND:20240509T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/92
DESCRIPTION:Title: The Bayesian Bootstrap: the Universal Multinomial Model a
nd non-informative Dirichlet Prior for statistical analysis.\nby Prof.
Murray Aitkin (University of Melbourne) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nWhere did t
his come from\, and where is it going?\n\nIt has a long history\, and has
possibly an even longer development period coming ...\n\nWhat does it offe
r?\n\n Fully model-based Bayesian nonparametric analysis of conventional
structural models:\n No Gaussian or other response distributions needed
-- just the multinomial.\n The non-informative Dirichlet prior: it's all
in the data.\n No hypothetical repeated samples.\n No asymptotics.\n\nWh
ere is it going?\n\nSome examples:\n\nAny GLM analysis can be made robust
against distribution failure\, provided the\nMLEs represent the population
parameters of interest\, as in linear regression.\n\nThe GLM analysis reg
resses the ``working variate" on the covariates with iterative weights.\nF
or the Bayesian analysis\, at convergence of the GLM algorithm the converg
ed working variate is\nregressed linearly on the covariates with random we
ights from the Dirichlet posterior\nwith the non-informative prior.\n\nExa
mple: Logistic regression: the Finney vasoconstriction data (Aitkin 2023 p
. 287).\nThe binary vasoconstriction response is modelled logistically on
two covariates\, log rate and\nlog volume.\n\nThis work has been supported
at various times by:\n\nthe UK Social Sciences Research Council and UK E
conomic and Social Research Council\; \n\nthe National Center for Educatio
n Statistics and the Institute of Education Sciences of the \n\nUS Depart
ment of Education\; and the Australian Research Council.\n\nContact: John
Hinde\, Carl Scarrott\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/92/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Marcelo Dias (University of Edinburgh)
DTSTART:20240425T110000Z
DTEND:20240425T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/93
DESCRIPTION:Title: [Engineering Seminar] Some Investigations on Stress Local
ization in Thin Elastic Sheets\nby Marcelo Dias (University of Edinbur
gh) as part of Maths seminars at the University of Galway\n\nLecture held
in G019\, Large Lecture Theatre\, Human Biology Building.\n\nAbstract\n
[This is part of the School of Engineering Seminar Series]\n\nKirigami\, a
n ancient art of paper cutting\, serves as a source of inspiration for inn
ovating in pattern formation and effective mechanical response of thin ela
stic sheets\, thus offering promising ways for reconfigurable structures s
uch as large deployable structures and microstructures like stretchable el
ectronics. Through manipulation of cut patterns\, kirigami sheets exhibit
nonlinear responses at the macroscopic level\, stemming from stress locali
zation and instabilities. This talk delves into these phenomena\, particul
arly focusing on local behaviour of a single cut—an elemental geometric
unit in kirigami design.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/93/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mark Dukes (University College Dublin)
DTSTART:20240905T150000Z
DTEND:20240905T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/94
DESCRIPTION:Title: Ascent sequences\, weak ascent sequences\, and related co
mbinatorial structures\nby Mark Dukes (University College Dublin) as p
art of Maths seminars at the University of Galway\n\nLecture held in ADB1
020.\n\nAbstract\nLet a=(a_1\,a_2\,...\,a_n) be a sequence of nonnegative
integers. An ascent in the sequence a is an index k for which a_{k+1}>a_k.
An ascent sequence is a sequence of non-negative integers that begins wit
h zero and in which every entry is bounded by one more than the number of
ascents preceding it. These sequences were introduced by Bousquet-Melou\,
Claesson\, Dukes and Kitaev (2010) and enjoy a rich collection of properti
es. In particular\, they uniquely encode a variety of combinatorial struct
ures. These include: Fishburn permutations\, (2+2)-free posets\, a class o
f integer matrices that have since become known as Fishburn matrices\, and
Stoimenow matchings. Recently\, Benyi\, Claesson and Dukes (2023) introdu
ced weak-ascent sequences\, a variant of ascent sequences\, and showed the
m to have a similarly rich collection of correspondences. Building on this
\, a further generalization was proposed in Dukes and Sagan (2024) and the
se are termed "difference d-ascent sequences". Properties of the correspo
nding difference ascent sequences are that several mappings from the weak
case can be extended to bijections for general d\, while the extensions of
others continue to be injective (but not surjective). This talk will pre
sent an overview of recent results on weak and difference ascent sequences
. It is joint work with Beata Benyi\, Anders Claesson\, and Bruce Sagan.\n
\n \n\nContact: Angela Carnevale\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/94/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Prof Christopher Voll (Bielefeld University)
DTSTART:20240515T150000Z
DTEND:20240515T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/95
DESCRIPTION:Title: Ehrhart theory\, Hecke series\, and vertex enumeration in
affine buildings\nby Prof Christopher Voll (Bielefeld University) as
part of Maths seminars at the University of Galway\n\nLecture held in ADB
1020.\n\nAbstract\nThe number of integral points of the integral inflation
s of a lattice polytope in Z^n is given by the polytope's Ehrhart polynomi
al\, a well-studied invariant in polyhedral geometry. How is this invarian
t\ndistributed over all superlattices of Z^n? Viewed locally\, this questi
on leads us to consider families of counting functions on the vertices of
affine buildings associated with classical $p$-adic groups.\n\nI will expl
ain how these counting functions are connected with classical multivariate
generating functions arising in number theory\, viz. Hecke series\, and e
igenfunctions for Hecke operators. I will assume no previous knowledge on
Ehrhart or Hecke theory.\n\nThis is joint work with Claudia Alfes and Josh
ua Maglione.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/95/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr. Svetlana Petrenko (University College London)
DTSTART:20240523T140000Z
DTEND:20240523T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/96
DESCRIPTION:Title: Mathematical models of diatom frustule patterning\nby
Dr. Svetlana Petrenko (University College London) as part of Maths semina
rs at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nD
iatoms are phytoplankton which are characterized by intricately micropatte
rned shells known as frustules. These organisms play a pivotal role in the
ecosystem\, contributing approximately 40% to primary production and 20-3
0% of oxygen we breath. They populate almost every aquatic habitat.\nThe d
iatom frustule consists of two overlapping halves. These parts consist of
silica exhibits geometrically shaped surfaces with patterns of small pores
. The micropatterning of the silica is of great interest in nanotechnology
due to the frustules' exceptional strength and unique optical properties.
Nanopatterned biosilica derived from diatoms serves as a versatile templa
te for the fabrication of other materials.\nThe formation of regularly str
uctured silica valves in diatoms is a captivating process in biomineraliza
tion\, involving specific organic molecules such as long-chain polyamines\
, silaffins\, and silacidins. The molecular structure of synthesized polya
mines greatly affects the quantity\, size\, and shape of silica precipitat
es. Experimental findings indicate that silica precipitation occurs at spe
cific concentrations of phosphate ions\, with higher concentrations result
ing in larger aggregates of organic molecules that serve as templates for
silica formation.\nOur study focuses on the hypothesis that pattern format
ion in diatom valve structures is driven by the phase separation of specie
s-specific organic molecules\, with the evolving organic structures acting
as templates for silica deposition. We specifically investigate the role
of phosphate ions in the self-assembly of long-chain polyamines and analyz
e how their reaction with organic molecules impacts the morphology of the
organic template. By varying the model parameters\, including degree of di
ssociation and initial concentrations of reacting components\, we show tha
t the resulting geometric features of the patterns are highly dependent on
these factors. \nFurthermore\, we explore the scenario where an initial a
rray of organic droplets serves as a static template for silica deposition
\, considering the effects of "prepatterning" by the silica costae in the
base layer. We obtain numerical solutions that generate a diverse range of
two-dimensional patterns closely resembling the valve structures observed
experimentally. The talk will also address the influence of the growing d
omain on pattern formation.\n\nContact: Stephan Rudykh\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/96/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Marston Conder (University of Auckland\, New Zealand)
DTSTART:20240904T140000Z
DTEND:20240904T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/97
DESCRIPTION:Title: Recent discoveries about finite quotients of triangle gro
ups\nby Marston Conder (University of Auckland\, New Zealand) as part
of Maths seminars at the University of Galway\n\nLecture held in ADB1020.
\n\nAbstract\nFor integers $k\,l\,m > 1$\, the ordinary {\\em triangle gro
up\\/} $\\Delta^+(k\,l\,m)$ is the group with presentation $\\langle\\\, x
\,y \\ | \\ x^k = y^l = (xy)^m = 1 \\\,\\rangle$\, or equivalently $\\lang
le\\\, x\,y\,z \\ | \\ x^k = y^l = z^m = xyz = 1 \\\,\\rangle$. Such grou
ps play an important role in the study of large automorphism groups of alg
ebraic curves and compact Riemann surfaces\, and of regular maps on orient
able and non-orientable surfaces. Much of the early part of this study (d
ating back over 100 years to work by Dyck\, Klein and Burnside\, for examp
le) considered only small quotients of triangle groups\, and subsequent wo
rk (by Macbeath\, Higman and others) concentrated on finite simple quotien
ts (such as $\\PSL(2\,q)$\, the alternating groups\, and even some of the
exceptional finite simple groups). But surprisingly\, the recent determin
ation of all orientably-regular maps of `small' genus (now up to genus 150
1) has shown that finite simple groups and finite insoluble groups account
respectively for less than 0.1\\% and less than 7\\% of the associated qu
otients of ordinary triangle groups (with quotient order up to about $1000
00$)\, while finite soluble quotients account for over 93\\%. Very little
attention has been paid to soluble quotients\, and in this talk I will des
cribe some recent research (with my PhD student Darius Young) that helps t
o correct this relative lack of attention. In particular\, I will explain
how every non-perfect hyperbolic ordinary triangle group has a smooth fini
te soluble quotient of derived length $c$ for some $c \\le 3$\, and has in
finitely many such quotients of derived length $d$ for every $d > c$. Als
o I will report on some work by Darius in the last few weeks in which he p
roved that the natural density (in the positive integers) of the set of or
ders of finite quotients of a triangle group $\\Delta^+(k\,l\,m)$ is {\\b
f zero} for every triple $(k\,l\,m)$. This work completed an investigati
on by Larsen (2001)\, but avoids resorting to the classification of finite
simple groups. It also led to the following (proved by MC \\& Gabriel
Verret): the natural density of the orders of finite quotients of the free
product $C_p * C_q = \\langle\\\, x\,y \\ |\\ x^p = y^q = 1\\\,\\rangle$
is zero whenever $p$ or $q$ is odd\, but is positive whenever $p$ and $q$
are even. Furthermore\, this had unexpected consequences for the densities
of orders of finite arc-transitive graphs of given valency\, and also led
to a much more general theorem about possibilities for the density of ord
ers of finite quotients of a given finitely-generated infinite group.\n\nC
ontact: Angela Carnevale\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/97/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr Artur Gower (University of Sheffield)
DTSTART:20240528T110000Z
DTEND:20240528T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/98
DESCRIPTION:Title: Designing sensors for wind turbines and other big rotatin
g things\nby Dr Artur Gower (University of Sheffield) as part of Maths
seminars at the University of Galway\n\nLecture held in ADB1020.\n\nAbst
ract\nFor a wind turbine to efficiently convert movement into energy it ne
eds to rotate with very little resistance. As well as maintaining a smooth
movement\, the rotating parts of turbines need to support large forces du
e to winds\, waves\, or gravity. Bearings are the components that enable b
oth smooth rotation while also supporting variable loads. It is an ongoing
challenge to design\, and maintain\n\nbearings that are: large (meters in
diameter for wind turbines)\, under large forces\, or rotate at high spee
ds (like industrial centrifuges). Ideally we want these components\, and o
ther rotating components\, to last for decades without damage\, or at leas
t minimise the cost of maintenance.\n\n \n\nIn this talk\, I will give a l
ight overview of wind turbines\, why we want to put sensors on them\, and
how mathematics is crucial to decide where to put sensors and how to make
sense of what is measured.\n\nContact: Balbi\, Valentina\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/98/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr Tom Shearer (University of Manchester)
DTSTART:20240529T130000Z
DTEND:20240529T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/99
DESCRIPTION:Title: Mathematical Modelling of Biological Soft Tissues\nby
Dr Tom Shearer (University of Manchester) as part of Maths seminars at th
e University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn this t
alk\, I will discuss how mathematics can be used to model the mechanical b
ehaviour of biological soft tissues. In particular\, I will use aspects of
the theory of solid mechanics (nonlinear elasticity and viscoelasticity)
to explain how the microscopic structures in tendons and skin affect their
responses to forces and deformations. Both of these tissues are construct
ed primarily from a protein called collagen\, which forms nanoscopic fibre
s called fibrils. The differing three-dimensional arrangements of these fi
brils from tissue to tissue give rise to highly varied and specialised mec
hanics. By understanding the relationships between the structure and funct
ion of these tissues\, we can inform the design of the next generation of
biomaterials and lab-grown tissues.\n\nContact: Balbi\, Valentina\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/99/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sairam Pamulaparthi Venkata (PhD defense) (University of Galway)
DTSTART:20240618T090000Z
DTEND:20240618T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/100
DESCRIPTION:Title: Designing instabilities in inhomogeneous soft auxetic st
ructures\nby Sairam Pamulaparthi Venkata (PhD defense) (University of
Galway) as part of Maths seminars at the University of Galway\n\nLecture
held in ADB1020.\n\nAbstract\nAuxetics\, also known as negative Poisson’
s ratio materials\, exhibit expansion (or contraction) in all directions w
hen stretched (or compressed)\, unlike conventional materials. This unique
characteristic finds applications in various fields such as bioprosthetic
s\, energy harvesting\, flexible electronics\, and sports helmets. Our stu
dy investigates the finite strain deformation behaviour of auxetic structu
res under different loads\, revealing complex surface patterns due to tail
ored distribution of material properties\, essential for their practical a
pplications.\n\nAs a proof of concept\, we investigate the wrinkling behav
iour of functionally- graded or inhomogeneous auxetic structures under var
ious loading conditions. This includes (a) studying the wrinkling of thin
and soft functionally-graded auxetic membranes under in-plane tensile load
s\, (b) designing instabilities in inflated circular and square auxetic me
mbranes under uniform pressure loading\, and (c) investigating the wrinkli
ng instability of 3D isotropic auxetic bilayer systems under tension.\n\nI
n summary\, we demonstrate that by tailoring the spatial inhomogeneities o
f the Young modulus and Poisson ratio along with the direction of loading\
, we can produce non-trivial wrinkling patterns at targeted locations in a
uxetic structures.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/100/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Oleksandra Gasanova (University of Duisburg-Essen)
DTSTART:20241010T140000Z
DTEND:20241010T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/101
DESCRIPTION:Title: Periodic lozenge tilings of the plane\nby Oleksandra
Gasanova (University of Duisburg-Essen) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nWe start wi
th the tiling of the plane by equilateral triangles. Their vertices form a
lattice which we will call L0. By merging two adjacent triangles of this
tiling we obtain a rhombus\, also known as a lozenge. It is clear that the
re exist 3 different orientations of them\, and that the plane can be tile
d with lozenges. Now let L1 be a cofinite sublattice of L0. We are interes
ted in lozenge tilings of the plane which are invariant under the translat
ion by any element in L1. Since L0/L1 is finite\, we are using only finite
ly many lozenges in our tiling (mod L1). To each L1-periodic tiling one ca
n attach a vector (called the type of the tiling) storing the information
about the number of lozenges of each orientation used in the tiling (mod L
1). This way we can split all the L1-periodic tilings into groups of diffe
rent types.\n\n\n\nThe main focus of the talk is to address the following
questions:\n\n\n\n1) For a given cofinite sublattice L1 of L0\, which type
s of L1-periodic tilings exist?\n\n2) For a given type\, can we list all t
he L1-periodic tilings of this type?\n\n \n\nContact: Emil Skoldberg\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/101/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leonard Henckel (University College Dublin)
DTSTART:20240913T140000Z
DTEND:20240913T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/102
DESCRIPTION:Title: Graphical tools for selecting conditional instrumental s
ets\nby Leonard Henckel (University College Dublin) as part of Maths s
eminars at the University of Galway\n\nLecture held in ADB1020.\n\nAbstra
ct\nInstrumental variables are an important tool for estimating causal eff
ects in the presence of unmeasured confounding. However\, it is also well-
known that instrumental variable estimators tend to be inaccurate. In resp
onse we consider the problem of how to graphically characterize conditiona
l instrumental sets that are valid and also efficient in linear structural
equation models compatible with a known acyclic directed mixed graph. We
first characterize the class of all valid conditional instrumental sets fo
r the target total effect and provide a graphical criterion that\, for cer
tain pairs of valid conditional instrumental sets\, identifies which of th
e two corresponding estimators has the smaller asymptotic variance. We the
n use these two results to characterize a valid conditional instrumental s
et for which the corresponding estimator has the smallest asymptotic varia
nce that can be ensured with a graphical criterion. \n\nContact: Nicola Fi
tz-Simon\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/102/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alberto Paccanaro (Royal Holloway University of London & FGV)
DTSTART:20241017T140000Z
DTEND:20241017T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/103
DESCRIPTION:Title: Machine learning algorithms for predicting disease genes
\, drug side effects and novel enzymes\nby Alberto Paccanaro (Royal Ho
lloway University of London & FGV) as part of Maths seminars at the Unive
rsity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nI will begin by p
resenting a method that we developed to quantify a distance between diseas
e modules on the human protein interaction network that uses only disease
phenotype information (that is\, roughly speaking\, the description of the
disease). I will show how this measure can be exploited by a learning alg
orithm that uses ideas from network medicine for inferring disease genes f
or heritable diseases. Importantly\, our method is the first that can be a
pplied also to diseases for which no disease gene is already known. \n\nI
will then describe a machine learning approach that we developed for the
prediction of drug side effects. This algorithm\, which is based on matrix
factorization\, is the first that can predict the frequency of drug side
effects in the population. The algorithm learns embeddings for drugs and s
ide effects as vectors in a low dimensional space and I will show that the
se representations can be interpreted\, leading to explanations for the pr
edictions that may shed some light on the underlying biological processes.
\n\nFinally\, I will present a recent work in which we have applied deep l
earning transformer-based models to learn complex distributions of sequenc
es of amino acids – this is similar to how Large Language Models model t
he distribution of word sequences in the context of Natural Language Proce
ssing. In particular\, I will show how we fine-tuned these models to speci
fic families of enzymes and how we can generate enzymes that have virtuall
y the same structure of natural enzymes\, but whose amino-acid composition
is very different. These new enzymes\, while retaining the enzymatic func
tion of their natural counterparts\, could have different physical-chemica
l properties\, thus enabling us to use them in industrial processes where
it would be unfeasible to use the natural enzymes (joint work with Prof Gi
orgio Valentini Lab at the University of Milan).\n\n \n\nShort Bio: Albert
o Paccanaro is Professor in the Department of Computer Science at Royal Ho
lloway\, University of London and in the School of Applied Mathematics (EM
Ap) at FGV in Rio de Janeiro. He completed his undergraduate studies in Co
mputer Science at the University of Milan and received his PhD from the Un
iversity of Toronto in 2002\, specializing in machine learning under the s
upervision of Geoffrey Hinton. From 2002 to 2006\, he was a postdoc in Man
soor Saqi’s lab at Queen Mary University of London and in Mark Gerstein
’s lab at Yale University. In 2006\, he joined Royal Holloway University
of London and started his own lab (www.paccanarolab.org). He has been vis
iting professor at Cornell\, Yale\, the University of Venice and the Catho
lic University of Asuncion in Paraguay. He is responsible for several inte
rnational collaborations and co-directs research grants together with acad
emics at Yale\, Cornell and the Liverpool School of Tropical Medicine. Alb
erto’s work focuses on developing machine learning algorithms to address
complex problems in molecular biology\, medicine\, and pharmacology. He i
s particularly interested in the integration of AI with systems biology an
d its potential to transform healthcare and drug discovery.\n\n \n\nContac
t: Haixuan Yang\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/103/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Doug Speed (Arhus University)
DTSTART:20240912T140000Z
DTEND:20240912T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/104
DESCRIPTION:Title: New tools for analyzing genome-wide association study da
ta\nby Doug Speed (Arhus University) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nI will desc
ribe some statistical tools for analyzing GWAS data\, implemented within m
y software package LDAK (www.dougspeed.com). These include tools for mixed
-model association testing (used to detect variants associated with a trai
t) and for constructing polygenic risk scores (used to create genetic pred
iction models of diseases).\n\nContact: Cathal Seoighe\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/104/
END:VEVENT
BEGIN:VEVENT
SUMMARY:James Cruickshank (University of Galway)
DTSTART:20241003T140000Z
DTEND:20241003T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/105
DESCRIPTION:Title: Combinatorial geometric constraint systems\nby James
Cruickshank (University of Galway) as part of Maths seminars at the Univ
ersity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nI will talk abou
t some problems that I worked on during my recent sabbatical. The common t
heme is the presence of a hypergraph together with some system of polynomi
al equations that is parameterised by the hypergraph. Such systems arise n
aturally in applied discrete geometry\, and also in algebraic combinatoric
s\, algebraic statistics and many other areas. The tools of rigidity theor
y can provide interesting geometric and combinatorial information about th
ese combinatorial geometric constraint systems. I will not assume that you
have any prior knowledge of the topics.\n\n \n\nContact: Haixuan Yang\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/105/
END:VEVENT
BEGIN:VEVENT
SUMMARY:David Malone (Maynooth University)
DTSTART:20241031T150000Z
DTEND:20241031T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/106
DESCRIPTION:Title: Why is it Thursday\, October 31st 2024\, 15:00:00 UTC?\nby David Malone (Maynooth University) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nAbstract:
There are lots of profound questions about time arising from physics\, phi
losophy and psychology. This talk doesn't answer any of them. Instead we'r
e going to answer the question "What time is it and why?" and see why we h
ave years\, months\, days and seconds. To get to the answer we'll have to
meet the stars\, Roman emperors\, a Pope\, a judge\, and some people who d
id their measurements too carefully.\n\n\n\n\n\nContact: Rachel Quinlan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/106/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Richard Aron (Kent State University)
DTSTART:20241015T140000Z
DTEND:20241015T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/107
DESCRIPTION:Title: Norm attainment and isometries\nby Richard Aron (Ken
t State University) as part of Maths seminars at the University of Galway
\n\nLecture held in ADB1020.\n\nAbstract\nWe investigate instances of when
isometries between Banach spaces do not preserve norm-attaining points. W
e will discuss this in light of recent work with Jose Bonet and Manuel Mae
stre\, and we will review older work on Lipschitz functions by Miguel Mart
in\, Vladimir Kadets\, and Mariia (sic) Soloviova.\n\nContact: Nina Snigir
eva\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/107/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Niall Madden (University of Galway)
DTSTART:20241114T150000Z
DTEND:20241114T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/108
DESCRIPTION:Title: An enriched finite element space for boundary layer prob
lems\nby Niall Madden (University of Galway) as part of Maths seminars
at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nAbs
tract: The numerical solution of singularly perturbed PDEs is both interes
ting and challenging. In this talk\, I'll first give a general introductio
n to these problems\, and some of the numerous attempts to construct speci
alised numerical schemes that take into account the presence of any layers
in the solutions. In the second part of the talk\, I'll present a fitted
operator-type approach\, where we incorporate information on boundary laye
rs into an otherwise standard finite element method. We'll also give some
thought to the stability of the scheme\, and the development of fast solve
rs.\n\nThis is joint work with Kirk Soodhalter and Adam Byrne (TCD).\n\n \
n\nContact: Haixuan Yang\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/108/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stephen Watson (York University)
DTSTART:20241205T150000Z
DTEND:20241205T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/109
DESCRIPTION:Title: How to Describe all Semiorders\nby Stephen Watson (Y
ork University) as part of Maths seminars at the University of Galway\n\n
Lecture held in ADB1020.\n\nAbstract\nA semiorder is a kind of partial ord
er in which incomparability need not be transitive. Semiorders have become
much used in mathematical economics and mathematical psychology\, particu
larly in modeling preferences. We will show that semiorders are exactly su
bsets of modified lexicographic products of three total preorders in which
the middle factor is the integers equipped with a shift operator\, and th
at this has several surprising consequences.\n\n \n\nContact: Aisling McCl
uskey\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/109/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Colin Semple (University of Edinburgh)
DTSTART:20241129T150000Z
DTEND:20241129T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/111
DESCRIPTION:Title: Genomic instability and mitochondrial dysfunction drive
high grade serous ovarian cancer\nby Colin Semple (University of Edinb
urgh) as part of Maths seminars at the University of Galway\n\nLecture he
ld in ADB1020.\n\nAbstract\nDeciphering the complex somatic variation pres
ent in tumour genomes is crucial to determine the events that drive tumour
progression and fully understand the evolution of tumours. High grade ser
ous ovarian cancer (HGSOC) is often considered an archetypal example of a
tumour type that is driven by frequent structural variants and genomic ins
tability\, while the roles of somatic mtDNA variants in this tumour type a
re poorly studied. We have comprehensively studied the mutational landscap
e driving HGSOC\, exploiting a large (N=324)\, deeply whole genome sequenc
ed dataset. We show that the genomic chaos seen in these tumours obscures
meaningful underlying patterns\, namely two divergent evolutionary traject
ories\, affecting patient survival and causing different genomic aberratio
ns. One involves homologous recombination repair deficiency (HRD) while th
e other is dominated by whole genome duplication (WGD) with frequent chrom
othripsis and breakage-fusion-bridges. Remarkably\, these heavily disrupte
d nuclear genomes are also frequently accompanied by alterations to the mi
tochondrial genome\, impacting patient survival. The magnitude of the impa
ct on survival is directly related to the types and frequencies of the mtD
NA variants involved. There is also evidence that mtDNA mutation loads int
eract with some structural alterations in the nuclear genome to affect sur
vival. These new layers of driver mutations\, mediated by genomic instabil
ity and mitochondrial dysfunction\, suggests new directions for research i
nto tumour biology and potential therapeutic targets.\n\nContact: Cathal S
eoighe\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/111/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seungjai Lee (Incheon National University)
DTSTART:20250130T150000Z
DTEND:20250130T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/113
DESCRIPTION:Title: Zeta functions of Lie algebras over finite fields\nb
y Seungjai Lee (Incheon National University) as part of Maths seminars at
the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn this
talk\, we study zeta functions enumerating subalgebras and ideals of Lie
algebras over finite fields. First\, I will outline a general framework fo
r computing these zeta functions\, followed by the derivation of explicit
formulas for new examples. Then\, by comparing these new computations with
known results\, we discuss their implications for the broader theory of z
eta functions of Lie algebras over commutative rings.\n\nContact: Joshua M
aglione\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/113/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bartosz Wcislo (University of Gdansk)
DTSTART:20250206T150000Z
DTEND:20250206T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/115
DESCRIPTION:Title: Truth values and semantic paradoxes\nby Bartosz Wcis
lo (University of Gdansk) as part of Maths seminars at the University of
Galway\n\nLecture held in MY129.\n\nAbstract\nClassical logic operates wit
h two truth values: true and false\, every sentence falling into one of th
ese two categories. In his seminal work\, Łukasiewicz investigated logics
with additional truth values\, most importantly allowing formally a sente
nce to be "indetereminate": neither really true nor really false. \nOne of
the areas influenced by the development of the multi-valued logics is the
study of semantic paradoxes. The most famous of these is probably Liar's
Paradox: it seems that there is no consistent way in ascribing a classical
truth value to the sentence "This sentence is false." The development of
logic has significantly narrowed the scope of possible solutions to this p
aradox and we currently much better understand their ramifications. One of
these solutions is to embrace one of the nonclassical logics and to deny
that Liar's Sentence is either true or false. In our talk\, we will presen
t certain variants of this approach and formal and philosophical challenge
s it faces. \n\nBIO: Bartosz Wcisło is a logician whose main area of rese
arch is metamathematics of foundational theories\, models of arithmetic\,
and\, more recently\, inner models of set theory. His main interest lies i
n applying formal tools to topics of philosophical significance. Currently
he is an assistant professor at the University of Gdańsk.\nHe has defend
ed his PhD thesis "Understanding the strength of compositional truth" in 2
018 at the University of Warsaw. Its main topic was to understand which ax
iomatic truth theories are conservative over Peano Arithmetic. Loosely spe
aking\, the goal was to isolate assumptions about the truth predicate whic
h allow us to draw new conclusions about mathematical facts. He has been e
xploring this topic for several more years. The research programme has bee
n named "Tarski Boundary" by Ali Enayat. More recently\, he became interes
ted in models of detereminacy and exploring absoluteness phenomena in set
theory.\n\nCoffee/tea/cakes/biscuits will be served after the lecture (abo
ut 4.10pm). The venue for Coffee/tea is changed from outside ADB1019 to i
n ADB1020. \n\nPlease Register at https://shorturl.at/GNWWP\n\nContact: Mi
chael McGettrick\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/115/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christopher Voll (Bielefeld University)
DTSTART:20250213T150000Z
DTEND:20250213T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/116
DESCRIPTION:Title: Combinatorial aspects of lattice enumeration\nby Chr
istopher Voll (Bielefeld University) as part of Maths seminars at the Uni
versity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nIn my talk I wo
uld like to show you some beautiful combinatorial\nstructures that come up
very naturally when one thinks about the\nenumeration of sublattices of t
he standard lattice Z^n\, the free\nabelian group of rank n.\n\nAll the st
ructures I will talk about come from\nHall--Littlewood--Schubert series\,
introduced in recent work with Josh\nMaglione. As their name suggests\, th
ey are related to the classical\nHall--Littlewood polynomials from the the
ory of symmetric functions\,\nand to the (likewise classical) Schubert var
ieties from algebraic\ngeometry.\n\nBy means of various substitutions\, Ha
ll--Littlewood--Schubert series\nhelp us\, on the one hand\, solve a varie
ty of known\, seemingly disjoint\ncounting problems\, including the comput
ations of Hecke series of\nsymplectic groups\, quiver representation zeta
functions\, and Hilbert\nseries of Stanley--Reisner rings. Yet other subst
itutions\, however\,\nindicate intriguing non-negativity phenomena pointin
g to yet more\ngeneral structures in combinatorial algebra.\n\nNo prior kn
owledge of any of the names dropped in this abstract should\nbe necessary
to enjoy this talk. Prior exposure to HLS series is\nneither a prerequisit
e for understanding nor a guarantee for boredom.\n\nContact: Joshua Maglio
ne\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/116/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Helena Smigoc (UCD)
DTSTART:20250227T150000Z
DTEND:20250227T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/118
DESCRIPTION:Title: Spectral arbitrariness for trees fails spectacularly
\nby Helena Smigoc (UCD) as part of Maths seminars at the University of G
alway\n\nLecture held in ADB1020.\n\nAbstract\nThe inverse eigenvalue prob
lem of a graph G is the problem of characterising all lists of eigenvalues
of real symmetric matrices whose off-diagonal pattern is prescribed by th
e adjacencies of G. The considerable literature on this problem over the p
ast few decades traces its roots to the less difficult (but still importan
t) special case where G is a path\, for which the full problem was resolve
d in 1974 by Hochstadt. For the path on n vertices\, any numerically order
ed list of n distinct real eigenvalues can be the ordered spectrum of a ma
trix whose pattern corresponds to a path. In particular\, we say that the
ordered multiplicity list of n singletons is spectrally arbitrary for the
path on n vertices.\n\nFor a general graph G\, spectral arbitrariness mean
s that the particular numerical values of the various singleton or multipl
e eigenvalues can be chosen arbitrarily\, with only the constraint that th
ey occur in the proper order. It has sometimes been tempting to expect\, e
specially in the case that G is a tree\, that any spacing of the multiple
eigenvalues should be realisable. Barioli and Fallat produced the first co
unterexample: a tree on 16 vertices and an ordered multiplicity list for w
hich every realising set of eigenvalues obeys a nontrivial linear constrai
nt.\n\nUsing combinatorial methods\, we identify a family of graphs and mu
ltiplicity lists whose realisable spectra are highly restricted. In partic
ular\, we construct trees with multiplicity lists that require a unique sp
ectrum\, up to shifting and scaling. This represents the most extreme poss
ible failure of spectral arbitrariness for a multiplicity list\, and great
ly extends all previously known instances of this phenomenon\, in which on
ly single linear constraints on the eigenvalues were observed. \n\nContact
: Rachel Quinlan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/118/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrew Simpkin (University of Galway)
DTSTART:20250220T150000Z
DTEND:20250220T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/119
DESCRIPTION:Title: Functional data analysis\, genomics and learning English
\nby Andrew Simpkin (University of Galway) as part of Maths seminars a
t the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nFunct
ional data analysis is the study of data that can be represented as functi
ons (e.g. curves and surfaces). Treating data in this way gives rise to ex
tended versions of common statistical approaches such as functional linear
models\, functional mixed models\, and functional principal components an
alysis. In this talk I will provide a background to some of these methods.
Applications in longitudinal biomarker and omics data will be presented f
rom collaborative work in Bordeaux. I'll then discuss a statistical learni
ng model which I developed during a visit to Rennes. The application here
was in language learning\, where features of a student's text give clues t
o their competency.\n\nContact: Nastaran Sharifian\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/119/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mohsen Daman (University of Galway)
DTSTART:20250312T140000Z
DTEND:20250312T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/120
DESCRIPTION:Title: (PhD Viva) The Mechanics of Biological Growth: A Study T
hrough The Vertex Model\nby Mohsen Daman (University of Galway) as par
t of Maths seminars at the University of Galway\n\nLecture held in ADB102
0.\n\nAbstract\nContact: Martin Meere\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/120/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Peter Phelan (University of Galway)
DTSTART:20250314T093000Z
DTEND:20250314T103000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/121
DESCRIPTION:Title: (PhD Viva) DGA Structures on Minimal Free Resolutions of
Binomial Edge Ideals\nby Peter Phelan (University of Galway) as part
of Maths seminars at the University of Galway\n\nLecture held in ADB1020.
\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/121/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Mackey (University College Dublin)
DTSTART:20250403T140000Z
DTEND:20250403T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/122
DESCRIPTION:Title: Fixed points of spin factor automorphisms\nby M
ichael Mackey (University College Dublin) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nA classic
result of Hayden and Suffridge provides that a biholomorphic automorphism
of the open unit ball of a Hilbert space has a fixed point when extended t
o the closed ball. We will introduce spin\nfactors\, also known as the Ca
rtan factors of type IV\, which form a key test space in the generalisatio
n of this result. We will explain why the approach used for Hilbert space
fails and present some conditions which guarantee that an automorphism of
the unit ball of a spin factor has a fixed point.\n\nThis is joint work w
ith Pauline Mellon.\n\nContact: Nina Snigireva\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/122/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Colm Mulcahy (Spelman College\, Georgia and South East Technologic
al University\, Waterford)
DTSTART:20250417T140000Z
DTEND:20250417T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/123
DESCRIPTION:Title: From One\, Two\, Many\, to ABC (or ten reasons why mathe
matics isn't as easy as 1\,2\,3)\nby Colm Mulcahy (Spelman College\, G
eorgia and South East Technological University\, Waterford) as part of Mat
hs seminars at the University of Galway\n\nLecture held in ADB1020.\n\nAb
stract\nAre there really primitive tribes whose system of counting goes:
“One\, Two\, Many\,. . .” indicating that from three on it’s a blur?
It’s surprising how little progress we’ve made in addressing some bas
ic problems in 3D or beyond\, or when solving seemingly simple equations i
n ≥ 3 variables.\n\n\nWe’ll survey ten fun topics in shapes and number
s and patterns whose basics and generalisations can be explored with littl
e mathematical background\, and which speedily lead to “what if?” ques
tions ranging from easy to tricky to “we just don’t know.”\n\n\nCake
s\, doughnuts\, coins\, boxes\, cubes\, primes\, squares\, and sums involv
ing powers will all make appearances. Occasionally\, we will stray into d
eeper waters and touch on more sophisticated topics.\n\nContact: Rachel Qu
inlan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/123/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joshuah Heath (Nordita Sweden)
DTSTART:20250605T140000Z
DTEND:20250605T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/124
DESCRIPTION:Title: Entanglement spectrum of matchgate circuits with univers
al and non-universal resources\nby Joshuah Heath (Nordita Sweden) as p
art of Maths seminars at the University of Galway\n\nLecture held in ADB1
020.\n\nAbstract\nThe entanglement level statistics of a quantum state hav
e recently been proposed to be a signature of universality in the underlyi
ng quantum circuit. This is a consequence of level repulsion in the entang
lement spectra being tied to the integrability of entanglement generated.
In this talk\, I will outline of our recent work (Projansky\, Heath\, & Wh
itfield\, Quantum 8\, 1432 (2024)) where we provide the first example of a
circuit which is composed of a simulable gate set\, yet has a Wigner-Dyso
n distributed entanglement level spectrum without any perturbing universal
element. We first show that\, for matchgate circuits acting on random pro
duct states\, Wigner-Dyson statistics emerge by virtue of a single SWAP ga
te\, in direct analog to previous studies on Clifford circuits. However\,
by studying Clifford and matchgate hybrid circuits\, we find examples of c
lassically simulable circuits whose output states exhibit Wigner-Dyson ent
anglement level statistics in the absence of universal quantum gate elemen
ts. Our study thus provides strong evidence that the entanglement spectrum
is not strongly connected to notions of simulability in any given quantum
circuit.\n\nContact: Mark Howard\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/124/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrea Fontanella (TCD)
DTSTART:20250529T140000Z
DTEND:20250529T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/125
DESCRIPTION:Title: Stepping into the Quantum Universe: Black Holes and Holo
graphy\nby Andrea Fontanella (TCD) as part of Maths seminars at the U
niversity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nTheoretical h
igh-energy physics is a rich and challenging field\, with many fundamental
questions still unresolved. One of the most profound is the formulation o
f a consistent theory of quantum gravity. I will begin by reviewing this p
roblem and explore how the holographic principle—a duality between gravi
tational and non-gravitational theories—offers a potential solution. How
ever\, the current formulation of holography relies on spacetimes with neg
ative curvature\, something that we do not experience in our Universe. I w
ill then discuss recent developments aimed at extending holography beyond
this setting\, and on how non-Lorentzian limits play a crucial role in the
se efforts. \n\nContact: Michael McGettrick\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Florian Schreier-Aigner (University of Vienna)
DTSTART:20250514T090000Z
DTEND:20250514T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/126
DESCRIPTION:Title: Growth diagram proofs for the Littlewood identities\
nby Florian Schreier-Aigner (University of Vienna) as part of Maths semina
rs at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nT
he (dual) Cauchy identity has an easy algebraic proof utilising a commutat
ion relation between the up and (dual) down operators. By using Fomin's gr
owth diagrams\, a bijective proof of the commutation relation can be "bije
ctivised" to obtain RSK like correspondences. In this talk I will introduc
e this machinery and extend it to Littlewood type identities by introducin
g a new family of relations between these operators\, called projection id
entities.\n\nContact: Joshua Maglione\n\nCoffee/Tea will be available at 9
.30.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/126/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Khaled Alzobydi (University of Galway)
DTSTART:20250513T090000Z
DTEND:20250513T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/127
DESCRIPTION:Title: (PhD Viva) Cellular Approximations to the diagonal map\nby Khaled Alzobydi (University of Galway) as part of Maths seminars at
the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThis w
ill be a 30-minute talk about the speaker's PhD work on cellular approxima
tions to the diagonal map in which he develops an implemented algorithm fo
r calculating cup products in the cohomology of finite regular CW complexe
s.\n\nContact: Graham Ellis\n\nCoffee/tea will be served after the talk\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/127/
END:VEVENT
BEGIN:VEVENT
SUMMARY:TBD (TBD)
DTSTART:20250512T140000Z
DTEND:20250512T153000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/128
DESCRIPTION:Title: The International Day of Women in Mathematics\nby TB
D (TBD) as part of Maths seminars at the University of Galway\n\nLecture
held in Hardiman Research Building exhibition space\; THB-G010\; AC201.\n\
nAbstract\nMay 12 is the International Day of Women in Mathematics\, marke
d by events around the world to celebrate the mathematical achievements of
women. \n\nEveryone is welcome to the following events\, hosted by the Sc
hool of Mathematical and Statistical Sciences.\n\nMonday 3.00: Opening of
the portrait exhibition "Women of Mathematics from around the World" in th
e Hardiman Research Building exhibition space (with light refreshments). T
he exhibition will remain in place until May 23 and will also feature some
relevant items from the University of Galway special collections. \n\n\nM
onday 3.30: Screening of "Secrets of the Surface: the Mathematical Vision
of Maryam Mirzakhani" in Room THB-G010.\n\nRuntime is one hour.\n\nOn the
same day\, the School will host a one-day conference\, the RIA-ICEDIM Wome
n in the Mathematical Sciences Day in AC201.\n\nContact: Rachel Quinlan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/128/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Francesca Ballatore (Laboratoire J. A. Dieudonn´e\, Universit´e
Cˆote d’Azur\, Nice\, France)
DTSTART:20250610T130000Z
DTEND:20250610T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/129
DESCRIPTION:Title: Modelling brain tumour progression and cerebral ventricl
e deformation through a patient-specific mechanical framework\nby Fra
ncesca Ballatore (Laboratoire J. A. Dieudonn´e\, Universit´e Cˆote d’
Azur\, Nice\, France) as part of Maths seminars at the University of Galw
ay\n\nLecture held in ADB1020.\n\nAbstract\nBrain tumours pose significant
medical challenges due to their unpredictable location and varying degree
s of malignancy. Malignant brain tumours\, in particular\, are known for t
heir aggressive behaviour\, presenting obstacles to effective treatment. T
he growth of a brain tumour can result in a mass effect\, causing compress
ion and displacement of surrounding healthy brain tissue. This can lead to
changes in ventricle volume\, resulting in increased intracranial pressur
e and potentially severe neurological complications [1]. Additionally\, ad
jacent healthy areas may also be compressed\, further compromising their n
ormal function and contributing to the overall impact of the tumour. The c
urrent standard of care for brain tumours involves surgical resection as t
he primary treatment\, followed by radiation therapy and chemotherapy\, wh
enever feasible [2]. In this study\, we propose a multiphase mechanical mo
del for brain tumour growth that quantifies deformations and solid stresse
s caused by the expanding tumour mass. Our model considers the influence o
f brain fibres on the tumour’s anisotropic growth patterns\, accounting
for the irregular and heterogeneous nature of brain tumours. To construct
realistic three-dimensional brain geometries and capture the shape of the
ventricles\, we incorporate patient-specific MRI and DTI data. By investig
ating the intricate interactions between brain tumours and the surrounding
brain tissue\, our model yields valuable insights into the extent of vent
ricular compression caused by tumour growth. Additionally\, it elucidates
the tumour’s impact on adjacent healthy brain areas. The numerical resul
ts obtained using the software FEniCS show the model’s effectiveness in
capturing the complex dynamics of brain tumour growth and its mechanical i
mpact on surrounding brain tissue. This work contributes to advancing our
understanding of tumour progression and has the potential to guide the dev
elopment of targeted therapies tailored to individual patients.\n\n \n\nRe
ferences:\n\n[1] A. Ahmed\, M. U. UlHaq\, Z. Mustansar\, A. Shaukat\, and
L. Margetts\, How growing tumour impacts intracranial pressure and deforma
tion mechanics of brain. Royal Society Open Science (2021)\, pp. 210165.\n
\n[2] R. Stupp et al.\, Radiotherapy plus Concomitant and Adjuvant Temozol
omide for Glioblastoma. New England Journal of Medicine (2005)\, pp. 987
–996.\n\nContact: Valentina Balbi for the Stokes workshop\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/129/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mario Falciatore (University of Galway)
DTSTART:20250611T130000Z
DTEND:20250611T140000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/130
DESCRIPTION:Title: Zeta Functions: from Arithmetic to Analysis\nby Mari
o Falciatore (University of Galway) as part of Maths seminars at the Univ
ersity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nZeta functions a
ppear in many areas of Mathematics\, including Number Theory\, Geometry an
d Mathematical Physics. The most famous example is the Riemann zeta functi
on\, which was originally defined as a simple infinite series yet is deepl
y connected to the distribution of prime numbers due to the remarkable ari
thmetic information it encodes. In this talk\, we will explore what zeta f
unctions are\, why they are interesting and how they arise naturally in Ma
thematics. We will examine how they transform arithmetic properties into a
nalytic entities and explore the surprising connections this perspective e
stablishes between various branches of Mathematics.\n\nFor this talk no pr
ior knowledge of Complex Analysis or Number Theory will be assumed — jus
t curiosity!\n\nContact: Valentina Balbi for the Stokes workshop\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/130/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Karim Adiprasito (IMJ-Paris Rive Gauche)
DTSTART:20251002T140000Z
DTEND:20251002T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/131
DESCRIPTION:Title: The Hard Lefschetz property\nby Karim Adiprasito (IM
J-Paris Rive Gauche) as part of Maths seminars at the University of Galwa
y\n\nLecture held in ADB1020.\n\nAbstract\nWe discuss a property originati
ng in algebraic geometry\, the Hard Lefschetz property\, how it is proven
and give connections to graphs\, polytopes and spheres.\n\nContact: James
Cruickshank\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/131/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Erin Evelyn Gabriel (the University of Copenhagen)
DTSTART:20251030T150000Z
DTEND:20251030T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/132
DESCRIPTION:Title: Improved small-sample inference for functions of paramet
ers in the k-sample multinomial problem\nby Erin Evelyn Gabriel (the U
niversity of Copenhagen) as part of Maths seminars at the University of G
alway\n\nLecture held in ADB1020.\n\nAbstract\nWhen the target parameter f
or inference is a real-valued\, continuous function of probabilities in th
e k-sample multinomial problem\, variance estimation may be challenging. I
n small samples or when the function is nondifferentiable at the true para
meter\, methods like the nonparametric bootstrap or delta method may perfo
rm poorly. We develop an exact inference method that applies to this gener
al situation. We prove that our proposed exact p-value correctly bounds th
e type I error rate and the associated confidence intervals provide at lea
st nominal coverage\; however\, they are generally difficult to implement.
Thus\, we propose a Monte Carlo implementation to approximate the exact p
-value and confidence intervals that we show to be consistent in the numbe
r of iterations. Our approach is general in that it applies to any real-va
lued continuous function of multinomial probabilities from an arbitrary nu
mber of samples and with different numbers of categories.\n\nContact: Nico
la Fitz-Simon\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/132/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Elise Lockwood (Oregon State University)
DTSTART:20250905T120000Z
DTEND:20250905T130000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/133
DESCRIPTION:Title: “Counting Is Hard” but It’s Rewarding and Fun: Ins
ights from a Research Program in Combinatorics Education\nby Elise Loc
kwood (Oregon State University) as part of Maths seminars at the Universi
ty of Galway\n\nLecture held in ADB1020 - Confirmed.\n\nAbstract\nProblems
in enumerative combinatorics (or counting problems) have a reputation for
being simple to state but difficult to solve\, to the point that one unde
rgraduate textbook author claims that “Counting is Hard.” My research
program has focused on demystifying counting problems for undergraduate st
udents – both by seeking to understand the nature of counting problems a
nd what makes them challenging\, and by exploring how to support students
in productively reasoning about and successfully solving counting problems
. In this talk\, I provide an overview of this research program\, highligh
ting some of my favorite big ideas and specific insights about the teachin
g and learning of combinatorics. In doing so\, I discuss what I learned ab
out combinatorics education through research projects that focused on the
multiplication principle\, generalization\, computational activity\, and m
athematical equivalence. I frame these ideas and insights within the non-l
inear path my research has taken over the years\, noting challenges and su
ccesses in carving out a research program in what was at the time a relati
vely under-studied area of mathematics education research.\n\nContact: Kir
sten Pfeiffer\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/133/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Flattery (University of Galway)
DTSTART:20250916T090000Z
DTEND:20250916T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/134
DESCRIPTION:Title: (PhD Viva) Generating Functions for the Casimir Invarian
ts of Simple Lie Algebras\nby Michael Flattery (University of Galway)
as part of Maths seminars at the University of Galway\n\nLecture held in
THB-G011 Seminar Room - Confirmed.\n\nAbstract\nIn this talk we review the
classification of simple complex Lie algebras and give an overview of the
ir representation theory including Klymik’s formula for decomposing tens
or products of irreducible representations. We review Okubo’s formula fo
r calculating the eigenvalues of general degree Casimir Operators on irred
ucible representations. Using Klymik’s formula and Okubo’s formula\, w
e obtain a new formula for efficiently calculating these eigenvalues. We a
pply our result to derive closed expressions for the generating functions
of these eigenvalues for the first fundamental representations of the non-
exceptional Lie algebras.\n\nContact: Michael Tuite\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/134/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Paul Levy (Lancaster University)
DTSTART:20250917T110000Z
DTEND:20250917T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/135
DESCRIPTION:Title: Lusztig's Special Pieces Conjecture\nby Paul Levy (L
ancaster University) as part of Maths seminars at the University of Galwa
y\n\nLecture held in THB-G011 Seminar Room - Confirmed.\n\nAbstract\nIn co
nnection with the Springer correspondence\, Lusztig defined an important s
ubset of the nilpotent orbits in a simple complex Lie algebra\, called the
special orbits. To each special orbit is associated an open subset of its
closure\, called a special piece\; the special pieces partition the nilpo
tent cone. A long-standing conjecture of Lusztig\, open in exceptional typ
es\, is that each special piece is the quotient of a smooth variety by a c
ertain finite group H.\n\nIn this talk I will outline a proof of the conje
cture. The first step is the establishment of a "local version"\, which ho
lds in a suitable transverse slice. In each case\, the transverse slice is
isomorphic to the quotient of a vector space by H. The local version allo
ws us to establish smoothness of a certain H-cover of the special piece\,
therefore establishing the conjecture. Along the way\, I hope to explore s
ome interesting connections with symplectic singularities\, Coulomb branch
es\, and invariant theory.\n\nThis is joint work with Fu\, Juteau\, Sommer
s and Yu.\n\nContact: Michael Tuite\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/135/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ryoshun Oba (IMJ-Paris Rive Gauche)
DTSTART:20250930T110000Z
DTEND:20250930T120000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/136
DESCRIPTION:Title: From (face) rings to stresses\nby Ryoshun Oba (IMJ-P
aris Rive Gauche) as part of Maths seminars at the University of Galway\n
\nLecture held in THB-G011 Seminar Room - Confirmed.\n\nAbstract\nWe expla
in how the rigidity of a bar-joint framework is related to regularity prop
erties of commutative rings\, and what numerical and combinatorial implica
tions this has for graphs\, polytopes and spheres.\n\nContact: James Cruic
kshank\n\nCoffee/Tea: The speaker will join the coffee/tea session at 2.30
pm Thursday in ADB-G022.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/136/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Brendan Guilfoyle (Munster Technological University\, Tralee)
DTSTART:20251023T140000Z
DTEND:20251023T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/137
DESCRIPTION:Title: Null hypersurfaces: from CT scans to the Critical Cateno
id Conjecture\nby Brendan Guilfoyle (Munster Technological University\
, Tralee) as part of Maths seminars at the University of Galway\n\nLectur
e held in ADB1020.\n\nAbstract\nUnderlying the mathematics governing tomog
raphy (such as CT scans) is a certain 3-dimensional hypersurface in the sp
ace of rays\, a hypersurface that is null with respect to the canonical ne
utral metric. This is not the only null hypersurface that could be used fo
r this purpose\, and others lead to different designs for scanning devices
. The first part of this talk will discuss the possible advantages of thes
e alternative designs and the null hypersurfaces behind them. \n\nWe will
then turn to the indefinite geometry of these hypersurfaces and explain h
ow they could be used to prove the currently open Critical Catenoid Conjec
ture\, which states that the only embedded minimal annulus in the unit bal
l in Euclidean 3-space which is orthogonal at the boundary is a catenoid.
\n\nThis is work carried out in collaboration with Nikos Georgiou\, Wilhel
m Klingenberg and Morgan Robson.\n\nContact: James Cruickshank\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/137/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christophe Hohlweg (Université du Québec à Montréal)
DTSTART:20251009T140000Z
DTEND:20251009T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/138
DESCRIPTION:Title: Reflections on Coxeter systems\nby Christophe Hohlwe
g (Université du Québec à Montréal) as part of Maths seminars at the
University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThere are th
ree families of Coxeter systems: finite\, affine and indefinite. By far\,
the class of indefinite Coxeter systems (containing the class of hyperboli
c discrete reflection groups for instance)\, is the less understood by lac
k of algebraic combinatorial tools. In this talk\, I will discuss recent d
evelopments of such tools and open problems involving the set of reflectio
ns of a (indefinite) Coxeter system\, some subarrangements of its Coxeter
hyperplane arrangement\, and their relationship to biautomatic structures.
\n\nContact: Angela Carnevale\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/138/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Myrto Manolaki (UCD)
DTSTART:20250929T140000Z
DTEND:20250929T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/139
DESCRIPTION:Title: Universal composition operators and complex dynamics
\nby Myrto Manolaki (UCD) as part of Maths seminars at the University of
Galway\n\nLecture held in AC204 - confirmed.\n\nAbstract\nThe investigatio
n of composition operators acting on spaces of analytic functions has been
an active branch of operator theory since the pioneering work of Nordgren
and Kamowitz. This talk is concerned with the study of composition operat
ors under the framework of universality. As we will see\, this provides in
teresting connections between the fields of linear dynamics and complex dy
namics. (Based on joint work with Vasiliki Evdoridou and Cliff Gilmore)\n\
nContatc: Nina Snigireva\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/139/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrew Smith (University College Dublin)
DTSTART:20251106T150000Z
DTEND:20251106T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/140
DESCRIPTION:Title: Fractals and Continuous-Time Gambling\nby Andrew Smi
th (University College Dublin) as part of Maths seminars at the Universit
y of Galway\n\nLecture held in THB-G011 Seminar Room - Confirmed.\n\nAbstr
act\nBrownian Blancmange is a fractal curve that bears some resemblance to
financial prices. It satisfies the same calculus as continuous-time Brown
ian motion but the construction is elementary. I will show how to construc
t Brownian Blancmange and perform calculus on it.\n\nContact: Nina Snigire
va\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/140/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cliff Gilmore
DTSTART:20250416T140000Z
DTEND:20250416T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/141
DESCRIPTION:Title: Contact: Nina\nby Cliff Gilmore as part of Maths sem
inars at the University of Galway\n\nLecture held in ADB1020.\nAbstract:
TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/141/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cliff Gilmore (UNIVERSIT E CLERMONT AUVERGNE)
DTSTART:20260416T140000Z
DTEND:20260416T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/142
DESCRIPTION:Title: TYPICALITY OF OPERATORS ADMITTING A HYPERCYCLIC ALGEBRA<
/a>\nby Cliff Gilmore (UNIVERSIT E CLERMONT AUVERGNE) as part of Maths sem
inars at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract
\nThis talk is concerned with the study of typical properties (in the Bair
e category\nsense) of particular classes of continuous linear operators ac
ting on Fr´echet alge-\nbras. The investigation of the typicality of oper
ators possessing particular linear\ndynamical properties was initiated in
the monograph by Grivaux\, Matheron and\nMenet [3].\nI will begin by intro
ducing the setting of closed balls BM (X) of bounded linear\noperators T :
X →X with ∥T ∥≤M \, for M > 0. Here X denotes the complex\nFr´ec
het algebras X= ℓp(N)\, 1 ≤p < +∞\, or X= c0(N). When endowed with\n
the topology of pointwise convergence\, i.e. the Strong Operator Topology
(SOT)\, the\nspace (BM (X)\, SOT) is Polish\, which allows us to employ Ba
ire catetory techniques.\nWe say that a property of elements of X is typic
al if the set of all x ∈X that\npossesses the property is comeagre in X.
\nDuring the talk\, I will recall some pertinent results from the area of
hypercyclic\nalgebras that will be of use\, in particular a criterion from
Bayart\, Costa J´unior and\nPapathanasiou [2]. To conclude\, I will give
an idea of the proof of the following\nresult: whenever M > 1\, a typical
operator in (BM (X)\, SOT) admits a hypercyclic\nalgebra.\nThis talk is b
ased on joint work with W. Alexandre and S. Grivaux [1].\nReferences\n[1]
W. Alexandre\, C. Gilmore\, and S. Grivaux. Typicality of operators on Fr
´echet algebras\nadmitting a hypercyclic algebra. Adv. Math.\, 478:Paper
No. 110406\, 2025.\n[2] F. Bayart\, F. Costa J´unior\, D. Papathanasiou\,
Dimitris Baire theorem and hypercyclic alge-\nbras\, Adv. Math. 376:Paper
No. 107419\, 2021.\n[3] S. Grivaux\, E. Matheron\, Q. Menet\, Linear Dyna
mical Systems on Hilbert Spaces: Typical\nProperties and Explicit Examples
\, Mem. Amer. Math. Soc. 269\, 2021.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/142/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Zurel (Simon Fraser University)
DTSTART:20251113T150000Z
DTEND:20251113T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/143
DESCRIPTION:Title: Efficient classical simulation of some quantum computati
ons\nby Michael Zurel (Simon Fraser University) as part of Maths semin
ars at the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\n
The promise of quantum computers is to be able to solve some computational
problems beyond the reach of any classical computer. But the source of th
is quantum computational advantage remains unclear. One way to approach th
e problem of characterizing this quantum advantage is to determine familie
s of quantum computations that can be efficiently simulated by a classical
computer. If a family of quantum computations admits an efficient classic
al simulation algorithm\, then it offers no possibility of a quantum compu
tational advantage\, and so we conclude that some resource outside the sco
pe of this family is necessary for a quantum advantage. Often the failure
of efficient classical simulation of quantum computations coincides with t
raditional notions of nonclassical behaviour in physical systems\, like qu
antum entanglement\, contextuality\, and negative values in the Wigner fun
ction. I will show that quantum computations on states with nonnegative Wi
gner functions can be efficiently simulated classically\, and that using r
elated classical simulation algorithms\, we can efficiently simulate quant
um computations on some states with negative Wigner function values.\n\nCo
ntact: Mark Howard\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/143/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jesse Lansdown (University of Galway)
DTSTART:20251016T140000Z
DTEND:20251016T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/144
DESCRIPTION:Title: Applications of association schemes via Delsarte theory<
/a>\nby Jesse Lansdown (University of Galway) as part of Maths seminars at
the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nAn ass
ociation scheme is a collection of highly regular relations. They arise na
turally in many settings and generalise both distance regular graphs and g
roups. Many interesting combinatorial objects\, such as designs\, codes\,
cliques\, and EKR-sets\, can be embedded into an association scheme. Perha
ps more surprisingly\, these objects can often be described by the eigensp
aces of the association scheme - in which case they are called Delsarte de
signs. In this talk I will give an introduction to both association scheme
s and Delsarte theory\, with examples and applications\, and also detail s
ome of my own contributions.\n\nContact: HY\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/144/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lasse Bjørn Kristensen (University of Copenhagen)
DTSTART:20251211T150000Z
DTEND:20251211T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/145
DESCRIPTION:Title: All I want for Christmas is ground states\nby Lasse
Bjørn Kristensen (University of Copenhagen) as part of Maths seminars at
the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThe ana
lysis of molecules is one of the most promising potential applications of
future quantum computers. However\, quantum state spaces are huge\, and fi
nding the relevant low-energy states of a given molecular system is a diff
icult problem—possibly even in the complexity theoretic sense. In this t
alk\, I will give a brief introduction to the field of quantum computing f
or chemistry\, and the related problem of state preparation. I will then e
xplain some of my own recent work in this field\, focusing especially on h
ow to use data-driven methods to make the problem easier\, and on how to u
se physics-inspired cooling-approaches to try to circumvent the hardness.
In this way\, I’ll hopefully convince you that cleverness may yet prevai
l in the face of difficulty—and hopefully without the need for too many
Christmas miracles. \nReferences: \n- The generative quantum eigensolver (
GQE) and its application for ground state search (arXiv:2401.09253)\n- Che
mically motivated simulation problems are efficiently solvable by a quantu
m computer (arXiv: 2401.09268)\n__________________________________________
__________________________________________________________________\n\nCont
act: Michael McGettrick\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/145/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Paul Yousefi (University of Bristol)
DTSTART:20251121T140000Z
DTEND:20251121T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/146
DESCRIPTION:Title: Machine learning strategies for biomarker development in
peripheral tissues\nby Paul Yousefi (University of Bristol) as part o
f Maths seminars at the University of Galway\n\nLecture held in ADB1020.\
n\nAbstract\nContact: Andrew Simpkin\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/146/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Giuseppe Zurlo (University of Galway)
DTSTART:20251120T150000Z
DTEND:20251120T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/147
DESCRIPTION:Title: Why am I stuck at five foot eight?\nby Giuseppe Zurl
o (University of Galway) as part of Maths seminars at the University of G
alway\n\nLecture held in ADB1020.\n\nAbstract\nA fundamental question in b
iology is how growing organisms manage to select a final size. Experiments
show a clear divide: some tissues reliably reach a terminal size and stop
proliferating\, while others (such as cancerous tissues) can grow indefin
itely\, up until the death of the whole tissue occurs. These contrasting b
ehaviors appear closely tied to how cells both sense and generate mechanic
al stresses.\n\nI will present a geometric viewpoint based on growth incom
patibility\, a measure of how locally growing material cannot be globally
accommodated without inducing stress. Unlike traditional models relying on
an ad hoc “homeostatic stress”\, this approach regulates growth throu
gh a target incompatibility\, in analogy with how curvature is regulated i
n the Einstein–Hilbert action of General Relativity.\n\nThis analogy is
surprisingly revealing: in relativity\, curvature determines whether the u
niverse stabilizes or expands forever\; in tissues\, incompatibility may d
etermine whether growth halts or becomes unbounded. I will discuss how thi
s framework captures observed behaviors in model biological systems and po
int to a largely unexplored but mathematically rich connection between gro
wth mechanics and geometric ideas originating in gravitational physics.\n\
nContact: HY\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/147/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michel Destrade (University of Galway)
DTSTART:20260226T150000Z
DTEND:20260226T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/148
DESCRIPTION:Title: An introduction to the European Research Council grants<
/a>\nby Michel Destrade (University of Galway) as part of Maths seminars a
t the University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThis
talk provides an insider’s overview of the European Research Council and
its funding schemes\, informed by a 12-month secondment at the ERC Execut
ive Agency in Brussels in 2024-25. It explains how ERC proposals are evalu
ated in practice\, with emphasis on what panels look for when assessing ex
cellence\, ambition\, and feasibility. The presentation covers the differe
nt ERC grant types\, the structure of proposals\, the two-step evaluation
process\, common misconceptions\, and recurring reasons why strong applica
tions might fail. It also discusses how to frame a compelling frontier-res
earch narrative and how to position oneself strategically for the ERC gran
ts. \n\nContact: HY\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/148/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ruben von Boxtel (Princess Máxima Center for Pediatric Oncology i
n Utrecht)
DTSTART:20251125T140000Z
DTEND:20251125T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/149
DESCRIPTION:Title: Tracing cancer origins using single-cell genomes\nby
Ruben von Boxtel (Princess Máxima Center for Pediatric Oncology in Utrec
ht) as part of Maths seminars at the University of Galway\n\nLecture held
in ADB1020.\n\nAbstract\nUnderstanding how cancer arises is key to develo
ping better prevention and treatment strategies. Our research focuses on u
ncovering the origins of cancer by analyzing DNA at the single-cell level.
We aim to answer two fundamental questions: (1) why do children develop c
ancer despite minimal age-related DNA damage\, and (2) what processes driv
e the DNA mutations that are required for carcinogenesis?\n \nTo address t
hese questions\, we apply single-cell whole-genome sequencing to patient s
amples and use mutational patterns to reconstruct the earliest stages of c
ancer. This approach allows us to trace back its origins and identify crit
ical events that lead to malignancy. In parallel\, we use genome editing t
echnologies to introduce cancer-driving mutations into in vitro stem cell
models or expose them to potential carcinogens\, modeling the mechanisms t
hat shape cancer development.\n \nBy combining retrospective lineage traci
ng with experimental validation\, our work provides unique insights into t
he preventable causes of cancer and the molecular mechanisms that enable t
umors to arise and evolve.\n\nContact: Cathal Seoighe\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/149/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jane Breen (Ontario Technological University)
DTSTART:20251210T120000Z
DTEND:20251210T130000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/150
DESCRIPTION:Title: Kemeny's constant for Markov chains and random walks on
graphs\nby Jane Breen (Ontario Technological University) as part of Ma
ths seminars at the University of Galway\n\nLecture held in AC203.\n\nAbs
tract\nKemeny's constant is an interesting and useful quantifier of how we
ll-connected the states of a Markov chain are. Though it was first introdu
ced in the 1960s\, interest in this concept has recently exploded. This ta
lk will provide an introduction to Markov chains\, an overview of the hist
ory of Kemeny’s constant\, discussion of some applications\, and a surve
y of recent results\, with an emphasis on those where the combinatorial st
ructure of the Markov chain is of interest. This comes to the forefront wh
en the Markov chain in question is a random walk on a graph\, in which cas
e Kemeny's constant is interpreted as a measure of how `well-connected' th
e graph is.\n\nContact: Rachel Quinlan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/150/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Badriah Safarji (University of Galway)
DTSTART:20251209T093000Z
DTEND:20251209T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/151
DESCRIPTION:Title: (PhD viva) Rank distributions of graphs over the field o
f two elements\nby Badriah Safarji (University of Galway) as part of M
aths seminars at the University of Galway\n\nLecture held in ADB1020.\n\n
Abstract\nContact: Rachel Quinlan\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/151/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Harrison Anthony (University of Galway)
DTSTART:20251125T093000Z
DTEND:20251125T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/152
DESCRIPTION:Title: (PhD viva) Development\, implementation and evaluation o
f computational methods to quantify intratumoral heterogeneity and microsa
tellite instability\nby Harrison Anthony (University of Galway) as par
t of Maths seminars at the University of Galway\n\nLecture held in ADB102
0.\n\nAbstract\nContact: Cathal Seoighe\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/152/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anna Grossbach (University of Galway)
DTSTART:20251121T091500Z
DTEND:20251121T094500Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/153
DESCRIPTION:Title: (PhD viva) Longitudinal Dynamics of Epigenetics in Early
Life: Uncovering Genetic and Environmental Determinants from Infancy to A
dolescence\nby Anna Grossbach (University of Galway) as part of Maths
seminars at the University of Galway\n\nLecture held in ADB1020.\nAbstrac
t: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/153/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jacopo Umberto Verga (University of Galway)
DTSTART:20251104T091500Z
DTEND:20251104T093000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/154
DESCRIPTION:Title: (PhD viva) A Multi-Scale Computational Analysis of the T
umor Microenvironment in Blood Cancers: From Single-Cell to Spatial Determ
inants of Therapy Response\nby Jacopo Umberto Verga (University of Gal
way) as part of Maths seminars at the University of Galway\n\nLecture hel
d in Biomedical Sciences Building (BSB) seminar room.\n\nAbstract\nContact
: Eva and Pilib\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/154/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mikel Hernaez (CIMA University of Navarra)
DTSTART:20251104T140000Z
DTEND:20251104T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/155
DESCRIPTION:Title: Towards a causal understanding of dysregulated transcrip
tional mechanisms in health and disease\nby Mikel Hernaez (CIMA Univer
sity of Navarra) as part of Maths seminars at the University of Galway\n\
nLecture held in Biomedical Sciences Building (BSB) seminar room.\n\nAbstr
act\nContact: Eva Szegezdi\n\nOrganized by Eva Szegezdi (Biological and Ch
emical Sciences)\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/155/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michele D'Adderio (University of Pisa)
DTSTART:20260205T150000Z
DTEND:20260205T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/156
DESCRIPTION:Title: q\,t-combinatorics and sandpiles\nby Michele D'Adder
io (University of Pisa) as part of Maths seminars at the University of Ga
lway\n\nLecture held in ADB1020.\n\nAbstract\nIn 1987 Bak\, Tang and Wiese
nfeld introduced their famous sandpile model as a first system showing sel
f-organized criticality.\nIn 1988 Macdonald introduced his famous symmetri
c polynomials.\nEach of these two discoveries produced a huge amount of re
search that is still going on intensely today.\nBut until recently\, these
two lines of research went on without any relevant communication.\nIn thi
s talk we show how the combinatorics generated by these two important math
ematical objects come together in a surprising way\, proving that a strong
interaction between these two topics is now inevitable.\n\nContact: Angel
a Carnevale\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/156/
END:VEVENT
BEGIN:VEVENT
SUMMARY:__ (___)
DTSTART:20260305T150000Z
DTEND:20260305T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/157
DESCRIPTION:by __ (___) as part of Maths seminars at the University of Ga
lway\n\nLecture held in ADB1020.\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/157/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fei Chen (University of Galway)
DTSTART:20260129T150000Z
DTEND:20260129T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/158
DESCRIPTION:Title: Fast Alternating Fitting Methods for Trigonometric Curve
s for Large Data\nby Fei Chen (University of Galway) as part of Maths
seminars at the University of Galway\n\nLecture held in ADB1020.\n\nAbstr
act\nProblems that require fitting circles\, ellipses\, and curves of othe
r shapes such as dumbbell curves to data points in the plane arise in many
application areas such as pattern recognition\, computer vision\, statist
ics\, and data analysis. Available methods for fitting circles or ellipses
are very sensitive to outliers in the data\, and are time consuming when
the number of data points is large. To the best of our knowledge\, dumbbel
l curve fitting methods have not been considered in the literature. To fit
such a curve\, we introduce an alternating method where in each iterate\,
a regularized minimization problem is solved. This talk focuses on curve
fitting methods that are attractive to use when the number of data points
is large.\n\nThe methods introduced in this talk are not sensitive to erro
rs in the data points. Methods for fitting circles and ellipses efficientl
y minimize the sum of the squared geometric distances between the given da
ta points and the fitted curves. The techniques developed here can be appl
ied to fitting other kinds of curves as well.\n\nContact: Niall Madden\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/158/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kevin Allen (UCC)
DTSTART:20260326T150000Z
DTEND:20260326T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/159
DESCRIPTION:Title: Partitions\, Overpartitions and Rank Deviations\nby
Kevin Allen (UCC) as part of Maths seminars at the University of Galway\n
\nLecture held in ADB1020.\n\nAbstract\nA partition of a non-negative inte
ger n is a weakly increasing sequence of positive integers whose sum is n.
Partition ranks famously provide a combinatorial explanation to Ramanujan
’s congruences for the partition function. In 2017\, Hickerson and Morte
nson used rank deviations to describe a much more\ngeneral structure surro
unding these identities. An overpartition is a partition in which the firs
t occurrence of each part may be overlined. In this talk\, we discuss expl
icit formulas for the deviations\nof an infinite family of ranks for overp
artitions. This is joint work with Robert Osburn and Matthias Storzer.\n\n
Contact: Joshua Maglione\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/159/
END:VEVENT
BEGIN:VEVENT
SUMMARY:__
DTSTART:20260423T140000Z
DTEND:20260423T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/160
DESCRIPTION:Title: Contact: Niall\nby __ as part of Maths seminars at t
he University of Galway\n\nLecture held in ADB1020.\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/160/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Luke Kelly (University College Cork)
DTSTART:20260430T140000Z
DTEND:20260430T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/161
DESCRIPTION:Title: Some recent results in Bayesian phylogenetic inference\nby Luke Kelly (University College Cork) as part of Maths seminars at t
he University of Galway\n\nLecture held in ADB1020.\n\nAbstract\nContact:
Andrew\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/161/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ilia Pirashvili (University of Galway)
DTSTART:20260312T150000Z
DTEND:20260312T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/162
DESCRIPTION:Title: The Geometry of Monoids\nby Ilia Pirashvili (Univers
ity of Galway) as part of Maths seminars at the University of Galway\n\nL
ecture held in ADB1020.\n\nAbstract\nMonoids are one of the simplest algeb
raic objects\, yet are surprisingly interesting\, in part due to how many
different ways we can regard them. We can think of them as groups without
inverses (essentially the definition)\, rings without addition\, one-objec
t categories\, generalisations of toric varieties\, and many other viewpoi
nts.\n\nIn this talk\, we will study them from the viewpoint of algebraic
geometry. In particular\, we will examine the different types of points we
can associate to monoids\, and the topologies we can define on them. We w
ill mainly focus on commutative monoids\, though in the last part\, we wil
l also mention the non-commutative case\, if time permits.\n\nOne of the c
entral objects of study (other than monoids of course) will be topoi\, who
play a similar role in the world of monoids that abelian categories play
in classical algebraic geometry.\n\nContact: HY\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/162/
END:VEVENT
BEGIN:VEVENT
SUMMARY:__ (__)
DTSTART:20260319T150000Z
DTEND:20260319T160000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/163
DESCRIPTION:Title: __\nby __ (__) as part of Maths seminars at the Uni
versity of Galway\n\nLecture held in ADB1020.\n\nAbstract\nThis slot is fr
ee.\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/163/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Julia Münch (University of Liverpool)
DTSTART:20260409T140000Z
DTEND:20260409T150000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/164
DESCRIPTION:Title: Contatc: Nina\nby Julia Münch (University of Liver
pool) as part of Maths seminars at the University of Galway\n\nLecture he
ld in ADB1020.\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/164/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrei Cherkasov (University of Galway)
DTSTART:20260331T090000Z
DTEND:20260331T100000Z
DTSTAMP:20260404T111105Z
UID:mathseminarsnuig/165
DESCRIPTION:Title: (PhD viva) Magneto-mechanical instabilities in soft magn
etoactive particulate composites\nby Andrei Cherkasov (University of G
alway) as part of Maths seminars at the University of Galway\n\nLecture h
eld in ADB1020.\n\nAbstract\nContact: Michel Destrade\n
LOCATION:https://stable.researchseminars.org/talk/mathseminarsnuig/165/
END:VEVENT
END:VCALENDAR